In the equatiοn , the value οf a and b is 2 and 4.
What is equatiοn?A mathematical assertiοn that shοws the equality οf twο mathematical expressiοns is what an equatiοn in algebra is defined as. Fοr example, the equatiοn 3x + 5 = 14 is cοmpοsed οf the twο equatiοns 3x + 5 and 14, which are separated by the equal sign.
The equatiοn οf a parabοla in standard fοrm is
y = a(x - h)² + k
where (h, k) are the cοοrdinates οf the vertex and a is the cοefficient οf the x² term.
Here (h, k ) = (- 1, 3 ) and cοefficient οf x² term = 1 , then
=> y = (x - (- 1))² + 3 ,
=> y = (x + 1)² + 3
=> y = x² + 2x + 1 + 3
=> y = x² + 2x + 4
Nοw cοmpare tο y = x² + ax + b
Consequently, a = 2 and b = 4.
Thus, a and b have values of 2 and 4, respectively.
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16) Critique the sample method and the survey used by the guild. You’ll want to use some of the following words in your critique: sample, bias, random, response-bias, undercoverage, non-response, voluntary response.
Answer:
The critique of the sample method and survey used by the guild is as follows:
Sample: The sample used in the survey is not representative of the entire population. The survey was conducted only among the guild members, and hence it does not represent the views of non-members. This type of bias is called undercoverage bias.Bias: The survey seems to suffer from selection bias, where the participants who responded may not represent the entire population. This type of bias is known as response bias. It is possible that the members who chose to participate in the survey have different views from those who did not respond. Furthermore, the survey did not specify how the participants were selected, and hence there may be other types of bias present in the survey.Randomness: The survey did not use random sampling, which is a fundamental principle of survey research. A random sample ensures that every member of the population has an equal chance of being selected, which increases the representativeness of the sample.Non-Response: The survey did not address the issue of non-response bias, where participants who choose not to respond may have different views from those who respond. The survey did not specify the response rate, and hence it is unclear how many members chose to participate in the survey.Voluntary response: The survey seems to be a voluntary response survey, where members chose to participate voluntarily. This type of survey is known to suffer from bias because participants who respond are usually more motivated or have stronger opinions than those who do not respond.In summary, the survey used by the guild suffers from various types of bias, which may affect the validity and generalizability of the results. To improve the validity and reliability of the survey, the guild should use random sampling and address issues such as non-response and response bias.
12. Reason A data set is represented by the box plot shown. Between which two values would the middle 50% of the data be found? Explain.
The middle 50% data of the boxplot will be calculated between the value of 7 to 14.
Explain about the box plot?The variation in information is shown using a boxplot, which is a standardized method based on a five-number summary ("minimum," first quartile ("Q1"), median ("Q3"), and "maximum"). It can reveal information about your outliers' values. Boxplots can also show you exactly securely your data is grouped, whether or not your data is skewed, and whether or not your data is symmetrical.The data set ranges are:
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
Divide the given data in 4 quartiles Qs;
Q1 = 4 - 6
Q2 = 7 - 10
Q3 = 11 - 14
Q4 = 15 - 17
Thus, 50% data will be lying in Q2 and Q3.
Range - 7 - 14
Thus, the middle 50% data of the box plot will be calculated between the value of 7 to 14.
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The price of a mortgage is calculated using the present value of future cash flows, which includes an interest payment, CC, a principal payment, PrinPrin, the number of periods until the mortgage is to be paid off, tt, and a required rate of return, kk.
Mathematically, the general price movement of mortgages can be modeled as which of the following?
ΔPM=f(k)ΔPM=f(k)
ΔPM=f(Δk,ΔPrin)ΔPM=f(Δk,ΔPrin)
ΔPM=f(Δk,ΔC)ΔPM=f(Δk,ΔC)
ΔPM=f(Δk)
What are the type of securities that are issued to financial institutions where the funds are used to increase liquidity in the secondary mortgage market by financing the origination of mortgages? Check all that apply.
Private-label pass-through securities
Government National Mortgage Association (Ginnie Mae) mortgage-backed securities
Federal Home Loan Mortgage Association (Freddie Mac) participation certificates
Federal National Mortgage Association (Fannie Mae) mortgage-backed securities
The mathematical model that represents the general price movement of mortgages is: ΔPM = f(Δk, ΔPrin, ΔC)
Where ΔPM is the change in the price of the mortgage, Δk is the change in the required rate of return, ΔPrin is the change in the principal payment, and ΔC is the change in the interest payment.
This means that the change in the price of a mortgage is a function of the change in the required rate of return, the change in the principal payment, and the change in the interest payment.
The securities that are issued to financial institutions to increase liquidity in the secondary mortgage market by financing the origination of mortgages are:
Government National Mortgage Association (Ginnie Mae) mortgage-backed securitiesFederal Home Loan Mortgage Association (Freddie Mac) participation certificatesFederal National Mortgage Association (Fannie Mae) mortgage-backed securitiesFinancial institutions may also receive private-label pass-through securities, although these are not guaranteed by government entities like Ginnie Mae, Freddie Mac, or Fannie Mae.
They are not backed by the government, but by private institutions, which can make them riskier.
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Help me please.
Whoever answers right gets brainliest
Answer:y=x-5
Step-by-step explanation:this is the answer for sure
Answer:
[tex]y=x-5[/tex]
Step-by-step explanation:
Notice for every X you do increase your Y by 1, this is the slope must be 1, to check you can use the slope equation with any two points
[tex]m= \frac{-4-(-3)}{1-(2)} =-1[/tex]
The lets use one point and the line equation:
[tex]y-yo=m(x-xo)[/tex]
[tex]y+4=-1(x-1)[/tex]
Solving for Y you can obtain
[tex]y=x-5[/tex]
You can input any X value and check the Y value to be sure, for example, for X=3 you can check Y=3-5=-2. In the table for X=3 the Y value is -2, so this checks.
Twelve of the workers received the following salaries: three of them earn P12,500 a month, four of them earn P11,000; twoearn P10,500 and the rest earn P9,000 a month. What is the median salary of the workers?
The median salary of the workers is P11,000.
What is median?In statistics, the median is a measure of central tendency that represents the middle value of a data set when the data set is ordered from least to greatest (or vice versa). If the data set has an odd number of values, the median is the middle value. If the data set has an even number of values, the median is the average of the two middle values. The median is used as a measure of central tendency when the data set has outliers or is not normally distributed.
How to calculate median?To calculate the median of a set of numbers:
Put the numbers in order from lowest to highest.If the number of items in the list is odd, the median is the middle number. For example, if the list is 3, 5, 7, 9, 11, the median is 7.If the number of items in the list is even, the median is the average of the two middle numbers. For example, if the list is 4, 6, 8, 10, the median is (6 + 8)/2 = 7.In the given question,
To find the median salary of the workers, we need to arrange the salaries in order from lowest to highest.
The salaries are:
P9,000, P9,000, P10,500, P10,500, P11,000, P11,000, P11,000, P11,000, P12,500, P12,500, P12,500, P12,500
There are 12 workers, so the median salary will be the average of the 6th and 7th salaries when arranged in order.
Median salary = (P11,000 + P11,000)/2
= P11,000
Therefore, the median salary of the workers is P11,000.
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Determine the length of HK
Step-by-step explanation:
that height splits GK (32) into 2 parts :
8 and 32-8 = 24
then we use the geometric mean theorem for right-angled triangles
height = sqrt(p×q)
with p and q being the parts of the Hypotenuse.
so,
height = sqrt(8×24) = sqrt(192)
and now we can use Pythagoras
c² = a² + b²
with c being the Hypotenuse (the side opposite of the 90° angle), a and b are the legs,
to get HK.
HK² = height² + 24² = 192 + 576 = 768
HK = sqrt(768)
every nonzero real number has a reciprocal. zero does not have a reciprocal. therefore, zero is not a nonzero real number
The given argument is Valid because the conclusion follows the argument logically.
The argument is that "Every nonzero real number has a reciprocal. Zero(0) does not have a reciprocal. Therefore, zero is not a non-zero real number."
The argument can be expressed in logical form as:
⇒ Premise 1: For every nonzero real number x, there exists a reciprocal 1/x.
⇒ Premise 2: Zero does not have a reciprocal.
⇒ Conclusion: Therefore, zero is not a nonzero real number.
This argument is valid because the conclusion logically follows from the premises.
The premises establish that every nonzero real number has a reciprocal, and that zero does not have a reciprocal.
The conclusion then follows logically, as zero is explicitly excluded from the set of nonzero real numbers based on the definition of a reciprocal.
Therefore, the argument is valid.
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The given question is incomplete, the complete question is
Is The Following Argument Valid Or Invalid?
Every nonzero real number has a reciprocal. Zero does not have a reciprocal. Therefore, zero is not a nonzero real number.
Pls help! Due tmrrww!!
Answer:
1. basement: 1,4,7,10,13
middle : 2,5,8,11,14
top: 3,6,9,12,15
2. you just need to skip count ten times then we will have 30. so she lives in apartment 30.
Step-by-step explanation:
Jaydon has twice as much as cristiano .Ozias has $25 less than Cristiano .The three children have $195 altogether.How much money does Ozias have
Upon letting x variable be the amount of money Cristiano has. Cristiano has $55, Ozias has $30, Jaydon has $110
What is meant by variables?A variable is a symbol used to represent an unknown or changing value in an equation or expression. Variables can take on different values and are used to solve equations, simplify expressions, and model real-world situations.
According to the question
Let us use variables to represent the amount of money each child has:
Let x be the amount of money Cristiano has.
Then Jaydon has twice as much, that is 2x
And Ozias has $25 less than Cristiano, that is x - $25.
We know that the three children have a total of $195, so we can make an equation:
x + 2x + (x - $25) = $195
Simplify and solve for x:
4x - $25 = $195
4x = $220 x = $55
So Cristiano has $55, Jaydon has twice as much or $110, and Ozias has $25 less than Cristiano.
So Ozias has $55-$25= $30.
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Letsha wants to produce 80 pages information books for school project. She can have this done at local printing company at R0.35 per page.
Answer:
if u want total price then,
=Rs.35×80=Rs.2800
If 107 people attend a concert and tickets for adults cost $3.75 while tickets for children cost $3.5 and total receipts for the concert was $391.25, how many of each went to the concert?
Answer:
Step-by-step explanation:
Let's assume that 'a' adults and 'c' children attended the concert.
From the problem statement, we know that:
a + c = 107 ---(1) (The total number of people who attended the concert is 107)
3.75a + 3.5c = 391.25 ---(2) (The total revenue generated from the concert is $391.25)
Now, we need to solve these two simultaneous equations to find the values of 'a' and 'c'.
To do this, we can use the elimination method to solve these equations.
First, we will multiply equation (1) by 3.5 to eliminate 'c':
3.5a + 3.5c = 374.5 ---(3)
Next, we will subtract equation (3) from equation (2):
3.75a + 3.5c - (3.5a + 3.5c) = 391.25 - 374.5
0.25a = 16.75
a = 67
Now that we know the value of 'a', we can substitute it into either equation (1) or (2) to find the value of 'c':
a + c = 107
67 + c = 107
c = 40
Therefore, there were 67 adults and 40 children at the concert.
-3+b> 7 OR b +9 <17.
The solution to the compound inequality -3+b> 7 OR b +9 <17 is given as follows:
b < 8 or b > 10.
How to solve the compound inequality?The inequality for this problem is defined as follows:
-3+b> 7 OR b +9 <17.
The or operation means that the we must solve each operation separately, and then the solution set to the compound inequality is given by the union of the solution set of each of the inequalities.
The solution set for the first inequality is given as follows:
-3+b> 7
b > 10.
The solution set for the second inequality is given as follows:
b + 9 < 17
b < 8.
Hence the solution for the entire inequality is of:
b < 8 or b > 10.
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What is the maximum number of students to whom 48 apples, 60 bananas and and 96 guavas can be distributed equally? Also find the shares of each fruit.
Answer:
The maximum number of students to whom 48 apples, 60 bananas, and 96 guavas can be distributed equally is 20. Each student will receive 2 apples, 3 bananas, and 4 guavas.
Question 8 (2 points)
A survey asked 1,000 people if they invested in Stocks or Bonds for retirement. 700
said they invested in stocks, 400 said bonds, and 300 said both.
How many invested in just stocks?
Note: consider making a Venn Diagram to help solve this problem.
700
300
400
none
300 is the correct answer.
WILL MARK AS BRAINLIEST!!!!!!!!!!!!!!
If "f" is differentiable and f(1) < f(2), then there is a number "c", in the interval (_____, _____) such that f'(c)>_______
If "f" is differentiable and f(1) < f(2), then there is a number "c", in the interval (1, 2) such that f'(c)> 0.
How do we know?Applying the Mean Value Theorem for derivatives, if a function f is continuous on the closed interval [a, b] and differentiable on the open interval (a, b), then there exists at least one number c in the interval (a, b) such that:
f'(c) = (f(b) - f(a)) / (b - a)
In the scenario above, we have that f is differentiable, and that f(1) < f(2).
choosing a = 1 and b = 2.
Then applying the Mean Value Theorem, there exists at least one number c in the interval (1, 2) such that:
f'(c) = (f(2) - f(1)) / (2 - 1)
f'(c) = f(2) - f(1)
We have that f(1) < f(2), we have:
f(2) - f(1) > 0
We can conclude by saying that there exists a number c in the interval (1, 2) such that:
f'(c) = f(2) - f(1) > 0
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You are crossing two pea plants. One is heterozygous for yellow. The second pea plant is homozygous for green. Use "G/g" as the letter to represent the gene for this problem.
The result of the cross breeding between the heterozygous and homozygous pea plant is the offspring will have a 50% chance of inheriting the dominant "G" allele and displaying yellow color, and a 50% chance of inheriting the recessive "g" allele and displaying green color.
What is the result of crossbreeding?In this problem, the heterozygous pea plant with yellow color is represented as "Gg" (where "G" is the dominant allele for yellow color and "g" is the recessive allele for green color). The homozygous pea plant with green color is represented as "gg" (where both alleles are recessive).
When these two plants are crossed, their offspring will inherit one allele from each parent, which will determine their phenotype (observable trait).
The possible combinations of alleles that the offspring can inherit from their parents are:
Gg x gg
Gametes from the Gg plant: G, gGametes from the gg plant: g, gPossible genotypes of offspring: Gg, gg (50% chance for each)Possible phenotypes of offspring: yellow (Gg) or green (gg) in a 1:1 ratioTherefore, in this cross, the offspring will have a 50% chance of inheriting the dominant "G" allele and displaying yellow color, and a 50% chance of inheriting the recessive "g" allele and displaying green color.
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Cant figure out the surface area
Answer:
[tex]96 \: {m}^{2} [/tex]
The correct answer is B
Step-by-step explanation:
First, we have to find the area of one side of the cube:
[tex]a(side) = 4 \times 4 = 16[/tex]
Now multiply this number by 6 (since the cube has 6 sides in total):
[tex]a(surface) = 16 \times 6 = 96[/tex]
Answer: B - 96 sq m
Step-by-step explanation:
The surface area is the area of all the squares added up. To find the area of one square, you multiply 4 x 4, which equals 16. Then, count the number of sides on the cube. There are 6 sides on this cube. So, you multiply 16 x 6. 96 is your total. And you can eliminate C because it says meters instead of square meters.
find surface area of cilinder with the radius of 9 and height of 14. make sure to put the correct exponents with answer.
The surface area is 1305. 96 square units
How to determine the surface areaIt is important to note that the formula for calculating the surface area of a cylinder is expressed with the equation;
SA = 2πrh + 2πr²
Given that the parameters are;
SA represents the surface area.r represents the radius of the cylinderh represents the height of the cylinderπ takes the value of 3.14Now, substitute the values, we have;
Surface area = 2 × 3.14 × 9 ×14 + 2 × 3.14 × 9²
Multiply the values
Surface area = 791. 28 + 508. 68
add the values
Surface area = 1305. 96 square units
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given a function f(x), find the critical values and use the critical values to find intervals of increasing/deacreasing, maxes and mins.
The critical values, the intervals of increasing or decreasing and the maximum and minimum points of the f(x) is (-1.5, -16), x < -1.5 and x = -1.5 and for b (4,6) and (2,10), (2,4).
A) Critical values
We will find out the critical value by solving for f ' (x) = 0
therefore, taking the derivative of given function we get,
f ' (x) = 4(2x) + 12 = 0
= 8x + 12 = 0
therefore, 8x = -12
x = -12/8
x= -1.5
x = -1.5 is the only critical value in x-coordinate. Now to determine the y-coordinate, simply put the value of x in the function f(x) = 4x2 + 12x - 7
we get, f(-1.5) = 4(-1.5)2 + 12 (-1.5) - 7
= 4(2.25) - 18 - 7
= 9 - 25 = -16
therefore, the critical value of the function f(x) = 4x2 + 12x - 7 is (-1.5, -16)
f(x) =x3 - 9x2 + 24x - 10.
Intervals of increasing and decreasing function is i.e. f decreases for
x < -1.5.
Therefore, f has minimum value at x = -1.5.
B) Critical values
We will find out the critical value by solving for f ' (x) = 0
therefore, taking the derivative of given function we get,
f '(x) = 3x2 - 9(2x) + 24
= 3x2 - 18x + 24 = 0
therefore, 3 ( x2 - 6x + 8) = 0
i.e x2 - 6x + 8 = 0
(x-4) (x-2) = 0
So, x = 4 or x = 2 are the two critical values in x-coordinate. Now to determine the y-coordinate, simply put the values of x in the function f(x) =x3 - 9x2 + 24x - 10
we get, Substituting x = 4
f(4) = 43 - 9 (4)2 +24 (4) -10
= 64 - 144 + 96 - 10
= 6
Now, Substituting x = 2
f(2) = 23 - 9(2)2 + 24(2) - 10
= 8 - 36 + 48 - 10
= 10
Therefore, the critical values of the function f(x) =x3 - 9x2 + 24x - 10 are (4,6) and (2,10).
Intervals of increasing and decreasing functions is f decreases in (2,4).
therefore, f has minimum at x = 4 and maximum at x = 2.
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Complete question:
For each function determine: i) the critical values ii) the intervals of increasing or decreasing iii) the maximum and minimum points.
a. f(x) = 4x²+12x–7 (3 marks)
b. F(x) = x°-9x²+24x-10 (3 marks)
12. If zo 125°, what does zz equal in this figure?
A. 125°
B. 180°
C. 35°
D. 55°
Answer:
A
Step-by-step explanation:
∠ o and ∠ z are alternate exterior angles and are congruent, that is
∠ z = ∠ o = 125°
(√3 + √3)²=
F) 12
G) 9
H) 6
J) 3
K) None of these
Answer:
F) 12
Step-by-step explanation:
To answer, we use the perfect square formula:
(a + b)² = a² + 2ab + b²
(√3 + √3)² = (√3)² + 2(√3)(√3) + (√3)²
Simplify:
√3² = 3
2(√3)(√3) = 2 x (√3)² = 2 x 3 = 6
Plug in:
(√3 + √3)² = 3 + 6 + 3 = 12
What is the probability that someone who does not take vitamins is a female? Round to three decimal places.
Female
Male
Total
(1 point)
O 0.374
O 0.139
O 0.080
O 0.626
Takes vitamins
248
145
193
Does not take vitamins
40
67
107
Total
288
212
500
Answer:
A) 0.374
Step-by-step explanation:
Let event A be that the person is female.
Let event B be that the person does not take vitamins.
[tex]\boxed{\sf Probability\:of\:an\:event\:occurring = \dfrac{Number\:of\:ways\:it\:can\:occur}{Total\:number\:of\:possible\:outcomes}}[/tex]
Therefore, from the given table:
[tex]\sf P(A) = \dfrac{288}{500}=0.576[/tex]
[tex]\sf P(B) = \dfrac{107}{500}=0.214[/tex]
[tex]\sf P(A \cap B)=\dfrac{40}{500}=0.08[/tex]
To calculate the probability that someone is female (Event A), given that they do not take vitamins (Event B), use the conditional probability formula for A given B:
[tex]\boxed{\begin{minipage}{5 cm}\underline{Conditional Probability formula}\\\\A given B:\\\\$\sf P(A|B)=\dfrac{P(A \cap B)}{P(B)}$\\\end{minipage}}[/tex]
[tex]\sf \implies P(A|B)=\dfrac{0.08}{0.214}=0.374\;(3\;s.f.)[/tex]
a. Provide two independent events that you know the probability of.
b. Explain how you know these events are independent.
c. Find the probability that they both occur.
a. Provide two dependent events.
b. Explain how you know these events are dependent.
c. Explain why these dependent events might require a different method for calculating the probability of both events occurring.
1. a. Rolling fair die, Flipping fair coin ; b. does not affect the occurrence of the other event; c. 1/4; 2. a. Picking red card, Picking another red card; b. affects the probability of the second event, c. use of conditional probability.
Describe Probability?Probability can be used to make predictions, analyze data, and make informed decisions in a wide range of fields, including science, economics, finance, engineering, and social sciences. It is often used in conjunction with statistical methods to make inferences about populations based on samples, and to test hypotheses about the relationships between variables.
There are many different types of probability, including classical probability, empirical probability, subjective probability, and conditional probability. Probability theory also includes concepts such as random variables, probability distributions, and statistical inference.
1. a. Two independent events:
Rolling a fair die and getting an even number.
Flipping a fair coin and getting heads.
b. These events are independent because the occurrence of one event does not affect the occurrence of the other event. In other words, the outcome of rolling the die does not influence the outcome of flipping the coin, and vice versa.
c. The probability of both events occurring is found by multiplying the individual probabilities of each event.
P(getting an even number on a die) = 3/6 = 1/2
P(getting heads on a coin) = 1/2
P(rolling an even number on a die AND flipping heads on a coin) = (1/2) * (1/2) = 1/4
2. a. Two dependent events:
Picking a red card from a standard deck of playing cards.
Picking another red card without replacing the first card.
b. These events are dependent because the occurrence of the first event affects the probability of the second event. If a red card is picked on the first draw, there are fewer red cards remaining in the deck for the second draw, which changes the probability of picking another red card.
c. The probability of both events occurring in this case would require the use of conditional probability. We would need to find the probability of picking a red card on the second draw given that a red card was picked on the first draw. This conditional probability would be affected by the number of red cards remaining in the deck after the first draw, which changes with each draw.
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Part B
Draw
parallel to
. You can draw
any length and place it anywhere on the coordinate plane, but not on top of
.
Find and record the ratio, n, of the length of
to the length of
. Then, multiply the lengths of
and
by n and record the resulting lengths.
In a diagram,
Then,
[tex]\dfrac{DE}{BC}=n[/tex]
For example, suppose that n=2; thus,
[tex]DE=2BC\longrightarrow2\times CA[/tex]
We can form a new triangle DEF whose side EF is parallel to CA; therefore,
[tex]\longrightarrow EF=2CA[/tex]
Does the expression 56x+40y-48z=8(7x+5y-6z)
For all values of x, y, and z, the expression 56x + 40y - 48z = 8(7x + 5y - 6z) holds true.
Explain expression using an example.As an illustration, the phrase x + y is one where x and y are terms with an addition operator in between. There are two sorts of expressions in mathematics: numerical expressions, which only contain numbers, and algebraic expressions, which also include variables.
Indeed, for all values of x, y, and z, the expression 56x + 40y - 48z = 8(7x + 5y - 6z) holds true.
We can simplify both sides of the equation to understand why:
56x + 40y - 48z = 8(7x + 5y - 6z)
56x + 40y - 48z = 56x + 40y - 48z
As we can see, the equation is true for all values of x, y, and z because both sides are identical.
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We can use the formula =rS12.6 to relate a ball's surface area S (in square centimeters) to its radius r (in centimeters). Suppose a ball has a radius of 12.04 centimeters. What is its surface area?
Carry your intermediate computations to at least four decimal places, and round your answer to the nearest tenth.
The surface area of the sphere ball is 1817.74 square centimeters.
What is surface area?Every geometric shape has a different surface area formula, but the goal of all of them is to determine the total area occupied by all of the objects' faces. While the lateral surface area is calculated to determine the area occupied by the shape's curved surface, the total surface area takes into account all faces of the 3D shape, including the flat and curved surfaces. The area of the bases is excluded. One 3D shape called a sphere has just one round surface and no flat base.
Given that the surface area is related using the relation r = √(S/12.6).
Also, the value of r = 12.04, substituting the value we have:
(12.04) = √(S/12.6)
Squaring on both sides:
Hence. the surface area of the ball is approximately 1817.74 square centimeters.
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The complete question is:
Suppose a small quantity of radon gas, which has a half-life of 3.8 days, is accidentally released into the air in a laboratory. If the resulting radiation level is 40% above the safe level, how long should the laboratory remain vacated? (Hint: To start with, determine what fraction of the "resulting radiation level" is the maximum safe level.)
The laboratory should remain vacated for days.
In response to the stated question, we may respond that As a result, the expressions laboratory should be closed for 5.19 days to allow the radon gas to decline to a safe level.
what is expression ?An expression in mathematics is a combination of numbers, elements, and mathematical (like addition, reduction, multiplication, division, algebraic, and so on) that expresses an amount or value. Expressions may well be simple, such as [tex]"3 + 4"[/tex], or complicated, such as [tex]"(3x2 - 2) / (x + 1)"[/tex]. They might additionally contain functions like "sin(x)" or "log(y)". Expressions can be assessed by substituting variables with their values and performing the arithmetic operations in the specified sequence. For example, if x = 2, the ratio [tex]"3x + 5" equals 3(2) + 5 = 11.[/tex]Expressions are commonly used in mathematics to describe real-world situations, generate equations, and simplify complicated mathematical concerns.
We must apply the notion of radioactive decay and the half-life of radon gas to address this dilemma.
Begin by calculating the percentage of the safe radiation level that corresponds to the 40% increase. This can be written as:
[tex]1 + 0.4 = 1.4[/tex]
As a result, the resultant radiation level is 1.4 times that of the safe threshold.
To compute the proportion of the original amount of radon gas that remains after a certain period t, we may use the following formula:
[tex]N/NO = (1/2) t/T1/2)1/2 t/3.8) = 1/1.42 t/3.8) 1.4t / 3.8 = log(2) * (1.4)(1.4)t = 3.8x * log(2) * (1.4)t = 5.19[/tex]
As a result, the laboratory should be closed for 5.19 days to allow the radon gas to decline to a safe level.
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in nonlinear models, the expected change in the dependent variable for a change in one of the explanatory variables is given by
The correct option is (C). In nonlinear models, the expected change in the dependent variable for a change in one of the explanatory variables is given by: ΔY = f(x₁ + ΔX₁, X₂ + ΔX₂, ..., Xk + ΔXk) - f(x₁, X₂, ..., Xk)
where ΔX₁, ΔX₂, ..., ΔXk are the changes in the respective explanatory variables. This equation represents the change in Y due to a simultaneous change in all the explanatory variables by ΔX₁, ΔX₂, ..., ΔXk. Option (C) represents the same equation in a slightly different notation. Option (A) only considers one explanatory variable, and option (B) does not include the baseline value of the function. Therefore, option (C) is the correct answer.
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Complete question:
In nonlinear models, the expected change in the dependent variable for a change in one of the explanatory variables is given by
A. ΔY= f(x₁ +Xq, X2, Xx) = f(Xq, X2....XK). 1 1'
B. ΔY = F(X,+ ΔX₁₁ X2, Xx) - F(X₁₁ X2, Xk). ---
C. ΔY = f(x,+ ΔX₁₁ X₂ + ΔX2, Xx+ ΔX x) - F(X₁₁ X2, Xx). 1°
D. ΔY = f(x₁ +Xq, X2, Xk).
A group of people were asked if they had run a red light in the last year. 131 responded "yes", and 452 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year. Give your answer as a fraction or decimal accurate to at least 3 decimal places Submit QuestionQuestion 9
Answer:
.224 or 224/1000 or 28/125
Step-by-step explanation:
The probability of a person chosen at random having run a red light in the last year is:
P(run a red light) = Number of people who said "yes" / Total number of people surveyed
P(run a red light) = 131 / (131 + 452)
P(run a red light) ≈ 0.224 (rounded to 3 decimal places)
So the probability is approximately 0.224 or 224/1000 or 28/125.
Answer:
131/583
Step-by-step explanation:
Probability is the measure of likelihood or chance that an event will occur.
[tex]\text{Probability} = \frac{\text{Possible outcome of event}}{\text{Total outcome}}[/tex]
Total number of people asked if they had run a red light = number of people that responded 'yes' + number of people that responded 'no'
[tex]\text{Total outcome} = 131+452[/tex]
[tex]\text{Total outcome} = 583[/tex]
[tex]\text{Possible outcome} = \ \text{number of people that responded yes} = 131[/tex]
Probability that if a person is chosen at chosen at random, they have run a red light in the last year will be 131/583.
Given a regular pentagon, what is the value of p?
A) 54º
B) 13º
C) 27º