A total of 3 ft falls over 3 days. On the first day, 1/6 of the total rain falls. On the second day, 7/12 of the total rain falls. How much rain falls each day in inches? Show your work. Please help.

the counts that make this sample fail the large counts condition for the chi-square goodness-of-fit test are

B) The observed count of orange candies and

C) The observed count of yellow candies.

Given,

Terrell's company sells candy in packs that are supposed to contain 50% red candies, 25% orange, and 25% yellow.

The large counts condition for a chi-square goodness-of-fit test requires that the expected count for each category is at least 5.

To determine which counts in Terrell's sample fail this condition, we first need to calculate the expected counts for each color:

Expected count of red candies = 0.5 x 16 = 8

Expected count of orange candies = 0.25 x 16 = 4

Expected count of yellow candies = 0.25 x 16 = 4

The observed count of red candies meets the large counts condition because the expected count and the observed count are both 8. However, the observed counts of orange and yellow candies do not meet the large counts condition because the expected count for each is 4, but the observed count is less than 5.

Therefore, the counts that make this sample fail the large counts condition for the chi-square goodness-of-fit test are

B) The observed count of orange candies and

C) The observed count of yellow candies.

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the expected orange

and

the expected yellow

A and B are mutually exclusive, meaning that a student can only be a senior or a freshman, but not both.

If events A and B are independent, the occurrence of one event does not affect the probability of the other event occurring. Mathematically, we can write this as:

P(A and B) = P(A) x P(B)

In our case, event A represents the probability that a student is a senior and event B represents the probability that a student is a freshman. Since a student can only be one of these options, the events are mutually exclusive. Mathematically, we can write this as:

P(A and B) = 0

Therefore, we can conclude that events A and B are mutually exclusive.

It's important to note that events can also be neither independent nor mutually exclusive. If events A and B are not independent or mutually exclusive, then the occurrence of one event affects the probability of the other event occurring. In this case, the formula for the probability of both events occurring is:

P(A and B) = P(A) + P(B) - P(A or B)

However, since events A and B are mutually exclusive, we do not need to use this formula.

Therefore, the correct option is (a).

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A. (iv) No the case that P(A ∩ B) = 0.5 is not possible. Since B is contained in the event A ∩ B, it must be the case that P(A ∩ B) ≤ P(B). However, 0.5 > 0.4 violates this requirement. (iv)

B. To find the probability that the selected student has at least one of these two types of cards, we can use the formula:

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

Substituting the values, we get:

P(A ∪ B) = 0.7 + 0.4 - 0.3 = 0.8

Therefore, the probability that the selected student has at least one of these two types of cards is 0.8.

C. The probability that the selected student has neither type of card can be calculated as the complement of the event that the student has at least one of these two types of cards. Therefore,

P(neither A nor B) = 1 - P(A ∪ B) = 1 - 0.8 = 0.2

D. The event that the selected student has a Visa card but not a MasterCard can be written as A ∩ B'. We can calculate its probability as:

P(A ∩ B') = P(A) - P(A ∩ B) = 0.7 - 0.3 = 0.4

E. To calculate the probability that the selected student has exactly one of the two types of cards, we can use the formula:

P(exactly one of A or B) = P(A ∪ B) - P(A ∩ B)

Substituting the values, we get:

P(exactly one of A or B) = 0.8 - 0.3 = 0.5

Therefore, the probability that the selected student has exactly one of the two types of cards is 0.5.

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The equation shown is used to find the force of gravity, F = G(m₁m₂)/R², between two objects.

All physical things with mass are drawn to the gravitational force, which can be thought of as an attractive force. The strongest known natural force is actually this one.

The attracting force F has a magnitude equal to G. (the gravitational constant, a number the size of which depends on the system of units used and which is a universal constant) multiplied by the product of the masses (m₁ and m₂) and divided by the square of the distance R:

F = G(m₁m₂)/R².

Newton’s Law would imply an infinite gravitational force when two very small objects touch, that is, when their centers of mass are so close that "r" is effectively zero.

In reality, this would only take place at the subatomic scale, but at the time of Newton, they were unaware of subatomic particles, the Quantum Theory, or Einstein's reinterpretation of gravity, which would have allowed them to rule out infinite or extremely strong gravitational forces. The least powerful force is gravity.

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17.6866 is  the range rule of thumb to estimate the standard deviation.

How to interpret a standard deviation?

The term "standard deviation" (or "") refers to the degree of dispersion of the data from the mean.

                        Data are said to be more closely grouped around the mean when the standard deviation is low and more dispersed when the standard deviation is high.

The rule of thumb for estimating standard deviation is given by

   σ = Range/4

The range is difference between maximum and minimum values

     σ ≈ 70 - 8/4

        ≈ 15.5

Use Microsoft excel or any other software to calculate the exact standard deviation

            σ = √1/n∑ⁿi (xi - x)²

                 = 17.6866

Our approximated standard deviation is almost equal to actual standard deviation.

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Probability of survival is 1/2, since only one of the two chambers is loaded. probability of survival is 4/5 is obtained by not re-spinning the chamber.

If I were faced with the choice, I would not choose either option as both choices involve significant risk. Instead, I would opt to not play the game at all as survival cannot be guaranteed.

In scenario mathematically, we can calculate the probabilities of survival for both options.

Let's assume that the chambers are numbered 1, 2, 3, 4, 5, and 6, with chamber 1 being the one that is lined up with the barrel after Bayes' first trigger pull.

If you choose to not re-spin the chamber and directly pull the trigger, the probability of survival is 4/5, since there are 4 remaining chambers that are not loaded.

If you choose to re-spin the chamber, the probability of survival:

The probability that the chamber aligned with the barrel is chamber 3 or 4 is 1/2. Given that chamber 3 or 4 is aligned with the barrel, the probability of survival is 1/2, since only one of the two chambers is loaded.

Therefore, the overall probability of survival if you choose to re-spin the chamber is (1/2) * (1/2) = 1/4.

Thus, the higher probability of survival is obtained by not re-spinning the chamber, with a probability of 4/5.

In the case with only one bullet, the probability of survival would be 5/6, making it a less dangerous scenario than this scenario with two bullets.

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_____The given question is incomplete, the complete question is given below:

bayes is playing russian roulette. the revolver has six chambers. he puts two bullets in two adjacent chambers, spin the cylinder, hold the gun to his head, and pull the trigger. it clicks and you survived.

so it is now the second try: may put the gun straight to your head and pull the trigger, or re-spin the gun before you do the same.

What is your choice and why? How does this differ from the case with only one bullet?

The work required to pump out half of the water from the aquarium is approximately 2000 J.

The volume of the aquarium is V = (6 m) x (1 m) x (1 m) = 6 cubic meters. Since the density of water is 1000 kg/m3, the mass of the water in the aquarium is m = ρV = 1000 kg/m3 x 6 m3 = 6000 kg.

To pump out half of the water, we need to remove 1/2 x 6000 kg = 3000 kg of water. Since work is force times distance, we need to calculate the force required to lift this mass of water a distance of 1 m (the height of the aquarium).

The force required is F = mg = (3000 kg) x (9.8 m/s2) = 29,400 N. The work done is W = Fd = (29,400 N) x (1 m) = 29,400 J.

To approximate the required work by a Riemann sum, we can divide the height of the aquarium into n subintervals of width Δx, and choose a sample point xi* in each subinterval.

The force required to lift the water in each subinterval is approximately constant, so the work required to lift the water in each subinterval is approximately F(xi*)Δx. The total work required is therefore approximately given by the Riemann sum:

nlim ∑ F(xi*)Δxi= nlim ∑ (1000 x 6 x Δxi x xi*)i=1

Taking the limit as n goes to infinity, this Riemann sum becomes the integral:

∫0^1 1000 x 6 x x dx

Evaluating this integral gives:

∫0^1 6000 x^2 dx = [2000 x^3]0^1 = 2000 J

Therefore, the work required to pump out half of the water from the aquarium is approximately 2000 J. This approximation becomes more accurate as the number of subintervals n becomes larger.

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The new area is 4A and the new circumference is 2C.

To find the new area of the circle, we need to use the formula for the area of a circle: A = πr^2, where r is the radius of the circle. If we double the radius, we get a new radius of 2r. So, the new area can be found as:

Thus, the new area is four times the original area.

To find the new circumference of the circle, we use the formula for the circumference of a circle: C = 2πr. Doubling the radius, we get a new radius of 2r. So, the new circumference can be found as:

New Circumference = 2π(2r) = 4πr

Thus, the new circumference is four times the original circumference.

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If probability distribution for a stock probability outcome is 5, 6 ,5 ,18, 1.

a) The expected return is 1.56

b) The standard deviation is 5.1715  

c) The coefficient of variation is 331.25%.

To calculate the expected return, we multiply each possible outcome by its probability and then sum the results. For example, the expected return from a 5% return is calculated as 0.5 x 5%, or 0.025. We do this for each possible outcome and then sum the results to get the expected return for the investment.

In this case, the expected return is 1.56, which means that over the long run, we can expect to earn an average return of 1.56% on this investment.

The standard deviation is a measure of how much the possible outcomes of an investment vary from the expected return. A higher standard deviation means that the possible returns are more spread out, while a lower standard deviation means that the possible returns are more tightly clustered around the expected return.

To calculate the standard deviation, we first need to calculate the variance, which is the average of the squared deviations from the expected return.

To calculate the variance, we first calculate the deviation of each possible outcome from the expected return. For example, the deviation of a 5% return from the expected return of 1.56% is 5% - 1.56% = 3.44%.

We then square each deviation and multiply it by the probability of that outcome. We do this for each possible outcome, and then sum the results to get the variance. In this case, the variance is 26.7424, which means that the possible returns are quite spread out.

The coefficient of variation is a measure of the risk per unit of return. It is calculated by dividing the standard deviation by the expected return and then multiplying by 100% to get a percentage. In this case, the coefficient of variation is 331.25%, which means that the investment is quite risky relative to its expected return.

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There were 44 children and 365 adults.

Let x = the number of children and

      y = the number of adults.

First equation: Children cost $4 and Adults cost $6.00.

In order to find the amount of money a group of children will cost, we multiply the number of children, x, by 4.

This is represented by 4x.

For adults, who cost 6 dollars to enter, we will use 6y.

The total amount of money made on the given day was $1574. To get this amount, we must add 4x and 6y.

14x+6y=1574 --------(1)

Second equation:

Total amount of people on the given day is 321.

To get this number, we must add together x and y, or the number of children and adults.

x + y = 321-----(2)

System of equations:

14x+6y=1574

x + y = 321

Let's use the substitution of the x variable to solve the system.

x + y = 321

y = 321 - x

Substitute y= 321 - x into the first equation.

14x+6(321 - x)=1574

14x + 1926 -6x = 1574

8x = - 352

x = 44

Substitute x = 44 back into y = 321 - x

y = 321 - (- 44)

y=365

There were 44 children and 365 adults.

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Answer: .1036

Step-by-step explanation:

The scale factor of for the given scaled reproduction of figure {P} to figure {Q} is 7/10.

Scale factor is a constant value that is used to dilate (enlarge or reduce) the image size. Mathematically, for the scale factor -

{K} > 1 : Enlargement

{K} < 1 : Shrinking

{K} = 1 : Preserved

Given is figure {Q} is a scaled reproduction of figure {P}.

We can write the ratio of their corresponding sides as constant. So, we can write, the scale factor as -

K = 14/20

K = 7/10

Therefore, the scale factor of for the given figure {P} to figure {Q} is 7/10.

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{QUESTION IN ENGLISH -

Figure Q is a scaled reproduction of Figure P. What is the number by which the measurement of Figure Q must be multiplied to obtain Figure P?

Figure P

20cm

Figure Q

14cm

Based on the provided data, the population standard deviation is 6.0 and the population variance is 36.0.

To calculate the population standard deviation and variance using a TI-83, TI-83 Plus, or TI-84 calculator, follow these steps:

1. Press the "STAT" button, and then select "Edit" to enter the data.

2. Enter the ages of the students into a list. For example, you could enter the ages into list L1.

3. Once you have entered the data, press the "STAT" button again, and then select "CALC."

4. Choose "1-Var Stats" and enter the list name that contains the data (L1 in this case). Press "ENTER" to see the result.

5. The calculator will display a list of statistics, including the population standard deviation (σx) and the population variance (σx²). Round these values to one decimal place.

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The True- False of given statements of Solutions of Equations are justified.

1.13 False. The solution set to a system of three equations in three unknowns can be a point, a line, or a plane. It depends on the system of equations and how they intersect in three-dimensional space.

1.14 False. A system of linear equations can have infinitely many solutions, one solution, or no solutions. It depends on the coefficients of the equations and the rank of the coefficient matrix.

1.15 False. The solution set to a consistent rank 2 linear system in four unknowns would be a plane in four-dimensional space, not a line.

1.16 False. A system of four equations in four unknowns may not have a solution, or it may have infinitely many solutions or one solution. It depends on the coefficients of the equations and the rank of the coefficient matrix.

1.17 False. A system of four equations in four unknowns can have infinitely many solutions or one solution, but it cannot have at most one solution.

1.18 True. The rank of a system is always less than or equal to the number of equations in the system.

1.19 (a) False. If (i) has exactly one solution, it does not necessarily mean that (ii) will have exactly one solution. It depends on the coefficients of the equations in (ii).

(b) False. If the solution set of (i) is a line, it does not necessarily mean that the same is true for (ii). It depends on the coefficients of the equations in (ii).

(c) True. If (i) has no solutions, then the same is true for (ii), since (ii) is equivalent to (i).

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The characteristics of each structural level in the corresponding boxes are hydrogen bonds, amino acids, and disulfide bonds

Protein structure is a key concept in biology, and it refers to the organization of amino acid sequences into three-dimensional structures. The different levels of protein structure are primary, secondary, tertiary, and quaternary.

On line 1, we have the primary structure, which refers to the linear sequence of amino acids in a protein. It is determined by the DNA sequence of the gene that encodes the protein. Each amino acid is joined to the next one by a peptide bond, forming a polypeptide chain.

On line 2, we have the secondary structure, which refers to the local folding of the polypeptide chain. The two structures depicted on the lines under line 2 are the alpha-helix and the beta-sheet. The alpha-helix is a coiled structure in which the polypeptide chain is twisted into a spiral shape, held together by hydrogen bonds. The beta-sheet is a flat structure in which the polypeptide chain is folded into a zigzag pattern, also held together by hydrogen bonds.

On line 3, we have the tertiary structure, which refers to the overall three-dimensional shape of a single polypeptide chain. It is determined by the interactions between amino acid side chains, such as hydrophobic interactions, hydrogen bonds, disulfide bonds, and van der Waals forces. The tertiary structure can be globular or fibrous, depending on the protein's function.

On line 4, we have the quaternary structure, which refers to the arrangement of multiple polypeptide chains in a protein complex. Some proteins consist of a single polypeptide chain, while others consist of two or more chains that interact with each other to form a functional unit. The quaternary structure is also determined by the same types of interactions as the tertiary structure.

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(a) The probability that the top card is an ace or a king is [tex]$\frac{2}{13}[/tex]

(b) The probability that the top card is spades and the second card is clubs is [tex]$\frac{1}{2652}[/tex]

(c) The probability that the top card is spades and the second card is an ace is [tex]$ \frac{1}{663}[/tex]

(d) The probability that the top 3 cards are all spades is [tex]$\frac{1}{132600}[/tex]

(e) The probability that the top 4 cards include 3 different ranks, with one rank appears twice is [tex]$\frac{2}{925}[/tex]

As per the data given:

A standard deck of 52 cards has 13 ranks (ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king) and 4 suits (spades, hearts, diamonds, and clubs), such that there is exactly one card for any given rank and suit.

a) The probability that the top card is an ace or a king:

The probability that the top card is an ace [tex]$\frac{4}{52} = \frac{1}{13}[/tex]

The probability that the top card is an king [tex]$\frac{4}{52}=\frac{1}{13}[/tex]

The probability that the top card is an ace or a king is [tex]$\frac{1}{13} +\frac{1}{13} =\frac{2}{13}[/tex].

b) The probability that the top card is spades is [tex]$\frac{1}{52}[/tex]

Already a card is drawn then the probability that the second card is clubs is [tex]$\frac{1}{51}[/tex]

The probability that the top card is spades and the second card is clubs is [tex]$\frac{1}{52}\times\frac{1}{51} = \frac{1}{2652}[/tex]

c) The probability that the top card is spades is [tex]$\frac{1}{52}[/tex]

Already a card s drawn then the probability that the second card is an ace is [tex]$\frac{4}{51}[/tex]

The probability that the top card is spades and the second card is an ace  is [tex]$\frac{1}{52}\times\frac{4}{51} = \frac{4}{2652} = \frac{1}{663}[/tex]

d) The probability that the top 3 cards are all spades is [tex]$\frac{1}{52}\times\frac{1}{51}\times\frac{1}{50} = \frac{1}{132600}[/tex]

e) There are C(52, 4) ways to choose 4 cards from the deck, and the 4 ways to choose the rank that appears twice.

So, the total number of ways to choose 4 cards with 3 different ranks and one rank appearing twice is 4 C(52, 4) = 4 × 270725.

The number of ways to choose the 4 cards such that they include 3 different ranks, with one rank appearing twice is 4  C(13, 2)  C(4, 2) = 672.

Hence, the probability is [tex]$\frac{672}{270725} =\frac{2}{925}[/tex]

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A standard deck of 52 cards has 13 ranks (ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king) and 4 suits (spades, hearts, diamonds, and clubs), such that there is exactly one card for any given rank and suit. The deck is randomly arranged. What is the probability that

(a) the top card is an ace or a king.

(b) the top card is spades and the second card is clubs.

(c) the top card is spades and the second card is an ace.

(d) the top 3 cards are all spades.

(e) the top 4 cards include 3 different ranks, with one rank appears twice (for example, an ace of hearts, a 3 of clubs, a 3 of hearts, and a 7 of spades).

Answer:

the answer is 3√3

Step-by-step explanation:

Answer:

the third one

Step-by-step explanation:

(2 × 10) + (5 × 1) + (3 × 0.1) + (6 × 0.01) + (7 × 0.001)

20+5+0.3+0.06+0.007=25.367

Answer:

the third number will be correct answer

The areas of the trapezoid is 50 units².

The trapezoid PQRS have bases 10 and 12 units respectively. The height of the trapezoid is unknown. Let's find the area of the trapezoid as follows:

area of trapezoid = 1 / 2 (a + b)h

where

Therefore,

a = 10 units

b = 15 units

Using Pythagoras's theorem,

5² - 3² = h²

h = √25 - 9

h = √16

h = 4 units

area of trapezoid = 1 / 2 (10 + 15)4

area of trapezoid = 1 / 2 × 25 × 4

area of trapezoid = 100 / 2

area of trapezoid = 50 units²

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Step-by-step explanation:

AND is represented by multiplication.

OR is represented by addition.

so, for independent A and B,

P(A and B) = P(A) × P(B) = 0.7 × 0.3 = 0.21

If two events, A and B, are independent ,then

P([tex]\frac{A}{B}[/tex]) = P(A)

⇒ P(A∩B) / P(B) = P(A)

⇒P(A∩B) = P(A) × P(B)

According to question ,

​P(A)​=0.7

P(B)=0.3​

Since A and B are independent events,

P(A∩B) = P(A) × P(B)

            = 0.7 × 0.3

            =0.21

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The coordinates points and quadrants on the grid shown above are listed below.

In Mathematics, a quadrant simply refers to the area that is occupied by the values on the x-coordinate (x-axis) and y-coordinate (y-axis) of a cartesian coordinate.

Based on the cartesian coordinate (grid) above, the coordinates points and quadrants should be identified as follows;

In conclusion, you should take note of the points on the x-axis and y-axis of the cartesian coordinate (grid).

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The coordinates of the child after 75 seconds in a carousal , if child enters at the point (0,1) are (-1, 0).

According to question, the child enters at the point (0,1), that is, on the due north position.

1 revolution = 1 minute

75 seconds = 75/60 = 5/4 of a minute

which means one full turn and then 1/4 turn.

Assuming the center of rotation is the origin.

If so, then 1/4 of a full turn means we rotate from (0,1) to (-1,0)

This is if we move counterclockwise.

The angle of rotation is (1/4)*360 = 90 degrees.

corresponds to the compass positions of North which means at (-1, 0)

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Answer:

The range rule of thumb states that the estimated standard deviation s is approximately equal to the range divided by 4.

Range = 1488 - 904 = 584 cm3

Therefore, the estimated standard deviation s is approximately:

s = Range / 4 = 584 / 4 = 146 cm3

The given exact standard deviation is 156.9 cm3.

Since the estimate is within 15 cm3 of the exact standard deviation, we can say that the estimate is accurate.

Answer:

4. Yes it is proportional

5.  -2          -1            0        1          2

     1             3           5        7         9  

6.    -8           -4             8          (I don't know pick ur own numbers I guess)

      -8         -6.5            -2  

Step-by-step explanation:

the line is a bit off look at my old answer.

The linear equation for the vehicle on each given time is:

Please refer to the attached picture for the complete question and the graph.

From the case, we know take several points based on the given time:

We can find the linear equation for each given time by finding the slope of the line and the constant of c. Remember that the linear equation formula is:

y = mx + c

where:

m = slope of line

c = constanta

We take the first 2 points:

(0, 24)

(3, 12)

slope (m) = y₂ - y₁

                  x₂ - x₁

m = (12 - 24) / (3 - 0)

m = (-12)/3 = - 4

We take the value of m into the linear equation and test it on one of the point we have:

(0, 24)

y = mx + c

24 = (-4)(0) + c

24 = - 4 + c

c = 28

Linear equation: y = -4x + 28

Next, we will take another pair of points:

(3, 12)

(6, 12)

slope (m) = (12 - 12) / (6 - 3)

m = 0

This shows that the linear equation for this part of graph is:

y = 12 --> because no matter changes on x, the value of y remains.

We take another pair of points:

(6, 12)

(9, 0)

slope (m) = (0 - 12) / (9 - 6)

m = (-12)/3 = -4

We take the value of m into the linear equation and test it on one of the point we have:

(9, 0)

y = -4x + c

0 = -4 (9) + c

c = 36

The linear equation for this part of graph is y = -4x + 36

The other part of graph's linear equation is y = 0 because the car has come into stop.

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The format option that would result in the following output format:

>> 5/16 + 2/7ans = 67/112 is format compact; format rational; format shortG;

To achieve the desired output format of ">> 5/16 + 2/7ans = 67/112", you can use the following format option in MATLAB:

>> format compact; format rational; format shortG;

This sets the format to:

compact, to suppress excess blank lines in output

rational, to display fractions instead of decimal approximations

shortG, to display numbers in short format

With this format option, MATLAB will display the result of the computation as a fraction, and the output will be compact and free of excessive whitespace.

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The representations of the inequality is  an open circle is at 1 and a bold line starts at 1 and is pointing to the right.

An inequality compares two values, showing if one is less than, greater than, or simply not equal to another value e.g. 5 < 6, x ≥ 2, etc.

Since our answer is x > 1.  An open circle will be at 1 and a bold line starts at 1 and is pointing to the right (>). Check the attached image.

Note: You only shade up if you have ≤ (less than or equal) or ≥ (greater than or equal).

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Answer:

Let X ~ B(0.6, 5)

Prob of success = 0.6 Prob of failure = 0.4

Amount of samples = 5

P(X [tex]\geq[/tex] 3) = P(3) + P(4) + P(5)

              = (5C3 x (0.6)^3 x (0.4)^2) + (5C4 x (0.6)^4 x (0.4)) + (0.6)^5

              = 0.6826 (cor to 4 dp)

P(X [tex]\leq[/tex] 4) = P(0) + P(1) + P(2) + P(3) + P(4)

              = 1 - P(5)

              = 1 - (0.6)^5

              = 0.9222 (cor to 4 dp)

P(X = 2) = P(2) = (5C2 x (0.6)^2 x (0.4)^3) = 0.2304

Mean = n x p = 5 x 0.6 = 3

Standard deviation = n x p x ( 1 - p) = 5 x 0.6 x (1 - 0.6) = 5 x 0.6 x 0.4 = 1.2

Using algebraic equations, the time Jack will catch up to Meg is 8 hours later, which is 7:00 pm.

Applying algebraic equations, let's start by finding out how far Meg traveled in the two hours before Jack started traveling.

Distance traveled by Meg in 2 hours = (2 hours) x (30 miles/hour) = 60 miles

Now, let's consider the time it takes for Jack to catch up to Meg. Let t be the time elapsed since Jack started traveling.

During this time, Meg will have traveled for t + 2 hours (since she started 2 hours earlier).

Distance traveled by Jack = (45 miles/hour) x t

Distance traveled by Meg = (30 miles/hour) x (t + 2) + 60 miles

Since Jack catches up to Meg at the same point in the route, their distances traveled must be equal:

(45 miles/hour) x t = (30 miles/hour) x (t + 2) + 60 miles

Simplifying this equation:

45t = 30t + 60 + 60

15t = 120

t = 8

Therefore, Jack will catch up to Meg 8 hours after Meg started traveling (remember that Meg started at 11:00 am, so 8 hours later is 7:00 pm).

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The solution is, 66% that a randomly chosen student has visited 30 or fewer states.

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.

here, we have,

The categories are mutually exclusive, so we have ...

 P(≤30) = P(1–10) +P(10–20) +P(20–30)

            = 5% +16% +45%

 P(≤30) = 66%

The probability is 66% that a randomly chosen student has visited 30 or fewer states.

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