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Question
Garret studies number of hours sleep per night among students who have a grade point average of 3.0–4.0 versus students who have a grade point average of 2.0–3.0.

His theory is that students who get more sleep will have a higher grade point average than students who get less sleep because they are more rested and, therefore, better able to concentrate.

In his samples, the mean number of hours of sleep students with a grade point average of 3.0–4.0 received each night was 6.8. The mean number of hours of sleep students with a grade point average of 2.0–3.0 received each night was 6.4.

Assuming there are no outliers or skew, do the results support Garret's theory?

Select from the drop-down menus to correctly complete the statements.

Since the samples were large and randomly chosen, we can use the samples to understand the populations.

Because the sample mean for students with a grade point average of 3.0–4.0 is
Choose...
a. less than
b. about the same
c.greater than
the sample mean for students with a grade point average of 2.0–3.0, the results
Choose...
a. tend to
b. do not tend to

Answer: 7,640

Step-by-step explanation: Because we know that she flew 2,299 the first year and 3,831 the second, we can add them together to get: 6,130. It says that she flew 1,510 more miles the third year than the first and second combined. Therefore: 6,130 + 1,510 = 7,640

You will be able to withdraw $3,548.50 per month for 20 years if you have $400,000 saved for retirement and earn 10% interest.

To calculate the monthly withdrawals for a given time period, we can use the present value annuity formula. This formula allows us to calculate the fixed monthly withdrawal amount needed to deplete a given initial amount (in this case, $400,000) over a specified time period (20 years) at a given interest rate (10%).

The formula for present value annuity is:

PMT = PV * r / (1 - (1 + r)⁻ⁿ)

Where:

PMT = the fixed monthly withdrawal amount

PV = the present value of the initial investment ($400,000)

r = the interest rate per month (10%/12 = 0.00833)

n = the total number of monthly withdrawals (20 years * 12 months per year = 240)

Plugging in the values, we get:

PMT = 400,000 * 0.00833 / (1 - (1 + 0.00833)⁻²⁴⁰) = $3,548.50 (rounded to the nearest cent)

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Based on these data, the correct statement is B. The mean best describes the data.

The mean is one of the measures of central tendency.

The mean is also described as the average.

The average or mean is the quotient of the total data value divided by the number of data items.

Furniture Store Sofa Sales

January              255

February            234

March                 263

April                   229

May                    248

Total sales =   1,229

The number of months of sales = 5

Mean = 245.8 (1,229 ÷ 5)

Thus, using the mean, we can conclude that the average sales from Januar to May were 245.8.

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The following table displays the number of sofas sold in a furniture store during certain months of the year.

Furniture Store Sofa Sales

January 255

February 234

March 263

April 229

May 248

Based on these data, which statement is correct?

A. There are outliers.

B. The mean best describes the data.

C. The median best describes the data.

D. The measure of variability that best describes the data is the IQR, 27.5.

The value of period of function is,

Period = 2

Since, A relation between a set of inputs having one output each is called a function. and an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

We have to given that;

The graph of function is shown in figure.

Since, The distance between the repetition of any function is called the period of the function.

And, For a trigonometric function, the length of one complete cycle is called a period.

Hence, By definition of period, we get;

The value of period of function is,

Period = 3 - 1

Period = 2

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Answer:

Step-by-step explanation:

1+3=4

4x4=16

10/2=5

16-5=11

answer is 11

The value of the y-intercept represent,

⇒  the amount of the account increases by each year.

We have to given that;

The graph shows an exponential function relating the balance in an investment account to the time in years.

Now, From graph we have;

The value of the y-intercept represent,

⇒  the amount of the account increases by each year.

Thus, value of the y-intercept represent,

⇒  the amount of the account increases by each year.

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This is a basic arithmetic problem and the solution to 9.7/0.0268 is equal to  361.94

Basic Arithmetic Operations are fundamental to solving mathematical problems and they are addition (+), subtraction (-), multiplication (×) and division (÷).

1. Addition:

Addition is the process of combining two or more numbers to find their total or sum. The symbol used for addition is "+". For example, to add the numbers 3 and 5, you write it as:

3 + 5 = 8

Here, 3 and 5 are added together to get the sum, which is 8.

2. Subtraction:

Subtraction is the process of finding the difference between two numbers. The symbol used for subtraction is "-". For example, to subtract 5 from 8, you write it as:

8 - 5 = 3

Here, 5 is subtracted from 8 to get the difference, which is 3.

3. Multiplication:

Multiplication is the process of repeated addition or combining equal groups. The symbol used for multiplication is "×" or "*". For example, to multiply 4 and 6, you write it as:

4 × 6 = 24

Here, 4 is multiplied by 6 to get the product, which is 24.

4. Division:

Division is the process of dividing a number into equal parts or finding how many times one number is contained within another. The symbol used for division is "÷" or "/". For example, to divide 20 by 5, you write it as:

20 ÷ 5 = 4

Here, 20 is divided by 5 to get the quotient, which is 4.

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Answer: b and c

Step-by-step explanation:

Answer:

The first question is 3 and the third question is the one with = 20

I have no answer for the second

The other answer left by farrelljacob646 is incorrect

The value of c in the polynomial is - 7.

The polynomial is given as follows:

p(x) = 2x³ - x² +  cx + 2 . The value of c if x - 2 is a factor of p(x) can be computed as follows:

Therefore,

p(x) = 2x³ - x² +  cx + 2

when x - 2 is a factor, p(x) = 0

Therefore,

0 = 2x³ - x² +  cx + 2

Hence,

2(2)³ - (2)² +  2c + 2 = 0

16 - 4 + 2c + 2 = 0

12 + 2 + 2c  = 0

2c = - 14

divide both sides by 2

c = - 14 / 2

c = - 7

Therefore,

c = -7

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There are no apparent solutions that satisfy both equations.

We have,

The system of equations is:

x² + 3x - 2 = 0

-x² + 2x + 4 = 0

To find the solutions, we can solve each equation separately:

x² + 3x - 2 = 0

This equation can be factored as:

(x + 2)(x - 1) = 0

Setting each factor equal to zero gives:

x + 2 = 0

x = -2

And,

x - 1 = 0

x = 1

-x² + 2x + 4 = 0

This equation does not factor easily, so we can use the quadratic formula:

x = (-b ± √(b² - 4ac)) / (2a)

For this equation, a = -1, b = 2, and c = 4.

Plugging in the values into the quadratic formula:

x = (-2 ± √(2² - 4(-1)(4))) / (2(-1))

x = (-2 ± √(4 + 16)) / (-2)

x = (-2 ± √20) / (-2)

Simplifying further:

x = (-2 ± 2√5) / (-2)

x = 1 ± √5

Now,

let's check which of these solutions satisfies both equations:

For x = -2:

(-2)² + 3(-2) - 2 = 4 - 6 - 2 = -4 ≠ 0

-(-2)² + 2(-2) + 4 = -4 - 4 + 4 = -4 ≠ 0

x = -2 does not satisfy both equations.

For x = 1:

1² + 3(1) - 2 = 1 + 3 - 2 = 2 ≠ 0

-(1)² + 2(1) + 4 = -1 + 2 + 4 = 5 ≠ 0

x = 1 does not satisfy both equations.

For x = 1 ± √5:

We can substitute these values into the equations, but it can be seen that they will not satisfy both equations either.

Therefore,

There are no apparent solutions that satisfy both equations.

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The expression which gives the number of months passed in terms of p is √300 -0.5p

We make t the subject of the formula in the expression

p = 600 - 2t²

subtract 600 from both sides in other to isolate 2t²

p - 600 = 600 - 2t² - 600

p - 600 = -2t²

Rearrange the equation

2t² = 600 - p

Divide both sides by 2 in other to isolate t²

2t²/2 = 600/2 - p/2

t² = 300 - 0.5p

Take the Square root of both sides in other to isolate t

√t² = √300 - 0.5p

t = √300 - 0.5p

Hence, the correct expression which gives the number of months t in terms of price p is t = √300 - 0.5p

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The graph of the given exponential function f(x) = 4(0.5)ˣ + 2 is g(x) = 5(1/6)ˣ + 2

Hence, the correct option is A.

An exponential function is a mathematical function of the form f(x) = aˣ, where "a" is a positive constant known as the base, and "x" is the independent variable. The exponential function is defined for all real values of x, and the output values of the function are always positive.

The exponential function is characterized by its unique property of having a constant rate of change with respect to its own value. This means that the function increases (or decreases) by a constant factor each time the independent variable is increased by a fixed amount.

For the given exponential function g(x) = 5(1/6)ˣ + 2 as the graph of f(x) and g(x) are same.

Hence, the correct option is A.

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(a) The given system of equation as an augmented matrix is [tex]\left[\begin{array}{cccc}1&3&0&150\\0&1&0&250\\-1&-1&1&400\end{array}\right][/tex];

(b) For the given augmented matrix, the system of equations is

-5x-6y-4z=400;

    y+z=100;

-3x-3y-2z=150;

A "system-of-equations" is a set of two or more equations which contain multiple variables. The solution to the system of equations is the set of values for the variables that satisfy all the equations in the system.

An "Augmented-Matrix" is a way to represent a system of linear equations in a concise and organized manner. It is obtained by writing the coefficients of the variables and the constants in each equation in a rectangular array, with each row representing an equation.

Part(a) : The system-of-equations is given as :

x  + 3r +0m = 150

0x + r + 0m = 250

-x - r + m = 400,

We see that the first column of the matrix will have 1, 0, -1,

the second-column will have 3, 1, -1 ;

the third-column will have 0, 0, 1.

So, the Augmented Matrix is represented as : [tex]\left[\begin{array}{cccc}1&3&0&150\\0&1&0&250\\-1&-1&1&400\end{array}\right][/tex].

Part(b) :

The augmented-matrix is given as : [tex]\left[\begin{array}{cccc}-5&-6&-4&400\\0&1&1&100\\-3&-3&-2&150\end{array}\right][/tex],

In this matrix, the terms in the "first-column" will be multiplied by variable"x";

the terms in the "second-column" will be multiplied by variable"y"; and

the terms in the "third-column" will be multiplied by variable"z";

The term sin the "fourth-column" represents the output value.

So, "system-of-equation" will be represented as : -5x - 6y - 4z = 400;

 0x + y + z = 100;

-3x - 3y - 2z = 150.

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a. Raina will have to pay a total of $2100 in interest.

b. The total repayment amount, including interest, will be $9100.

To calculate the total interest and total repayment amount, we can use the formula for simple interest:

Simple Interest = Principal * Rate * Time

(a) Total interest:

Principal = $7000

Rate = 6% per year

Time = 5 years

Total Interest = Principal * Rate * Time

= $7000 * 0.06 * 5

= $2100

(b) Total Repayment Amount = Principal + Total Interest

= $7000 + $2100

= $9100

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Answer:

GCF of 30 and 50 is 10 :}

John will have to pay $12.24 in interest at the end of the loan.

To calculate the amount of interest John will have to pay at the end of the loan, we can use the formula for simple interest:

Interest = Principal * Rate * Time

Given:

Principal (P) = $4,300.00

Rate (R) = 13.75% per annum

Time (T) = 8 days

First, we need to convert the rate from an annual percentage to a daily rate. Since there are 365 days in a year:

Daily Rate = (Rate / 100) / 365 = (13.75 / 100) / 365 = 0.0003767

Now we can calculate the interest:

Interest = Principal * Rate * Time

= $4,300.00 * 0.0003767 * 8

= $12.24

Therefore, John will have to pay $12.24 in interest at the end of the loan.

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Answer:

80 mm²

Step-by-step explanation:

Even for slanted triangles, the area is base x half height! The base is 10 mm, half the height is 8 mm, so the area is 8x10=80 mm.

The function with the same end behavior as f(x) = (10x³ + x² + 3)/(2x² + 1) is given as follows:

On a coordinate plane, a line goes through (-2, -10), (0, 0), and (2, 10).

The end behavior of a function refers to how the function behaves as the input variable approaches positive or negative infinity.

The function for this problem is given as follows:

f(x) = (10x³ + x² + 3)/(2x² + 1)

As we are looking for the end behavior, we look at the terms with the highest exponent, hence:

f(x) = 10x³.

Then the end behavior is given as follows:

Hence the function with the same end behavior is the increasing line, which is given by the first option.

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The equations and their graphs are:

Graph 4: I(x)=P(x)−4

Graph 2: I(x)=P(x+4)

Graph 1: I(x)=P(x)+4

Graph 3: I(x)=P(x−4)

Here we have,

to match the equations and their graphs:

The parent function is given as:

P(x) = x^2

As a general rule of function transformation, we have:

Vertical translation up: I(x) = P(x) + k

Vertical translation down: I(x) = P(x) - k

Horizontal translation left: I(x) = P(x + k)

Horizontal translation right : I(x) = P(x - k)

Using the above rules and the assumption that k is 4;

We have:

Vertical translation up: I(x) = P(x) + 4

Vertical translation down: I(x) = P(x) - 4

Horizontal translation left: I(x) = P(x + 4)

Horizontal translation right : I(x) = P(x - 4)

Hence, the graphs of the equations are:

Graph 4: I(x)=P(x)−4

Graph 2: I(x)=P(x+4)

Graph 1: I(x)=P(x)+4

Graph 3: I(x)=P(x−4)

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complete question;

Consider the function P(x)=x2, which is a parabola that opens upward, with a vertex at (0,0).

It undergoes four separate transformations as indicated by the graphs that follow.

P(x) represents the preimage and is placed correctly on all images. I(x) represents the image after the transformation.

Match each transformation indicated by I(x) to the correct graph.

Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.

I(x)=P(x)−4

I(x)=P(x+4)

I(x)=P(x)+4

I(x)=P(x−4)

The equation of the line in point-slope form, using the point (-2, -1), is: y + 1 = -2(x + 2)

The equation of a line in point-slope form is given by y - y₁ = m(x - x₁), where (x₁, y₁) represents a point on the line and m represents the slope.

Given:

Slope (m) = rise/run = -2

Point (-2, -1)

Substituting the given slope and point into the equation, we have:

y - (-1) = -2(x - (-2))

y + 1 = -2(x + 2)

Therefore, the equation of the line is: y + 1 = -2(x + 2).

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Yes, the given triangle is a right triangle.

We have,

This can be determined by applying the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

Now,

In this case, the squares of the side lengths are:

3² = 9

4² = 16

6² = 36

If the sum of the squares of the two shorter sides (9 + 16 = 25) is equal to the square of the longest side (36), then the triangle is a right triangle.

Thus,

In this case, since 25 is indeed equal to 36, the triangle with side lengths 3 miles, 4 miles, and 6 miles is a right triangle.

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The volume of the quarter-sphere tank is approximately 1,387,244 cubic feet.

The volume of tank 1 is 353h cubic feet, and the volume of tank 2 is  31,416 cubic feet.

The main tank is in the shape of a quarter-sphere, which means it is a quarter of a full sphere.

The volume of a sphere is given by the formula V = (4/3)πr³, where r is the radius of the sphere.

Given that the radius of the main tank is 95 feet

we can substitute this value into the formula to calculate the volume:

V = (4/3)π(95³) = 1,387,244 cubic feet.

The holding tanks are in the shape of cylinders that have been cut in half vertically.

The volume of a cylinder is given by the formula V = πr²h, where r is the radius of the base and h is the height.

For tank 1, the radius is given as 15 feet. Since it is a half-cylinder, we divide the volume by 2:

V1 = (1/2)π(15²)h = 353h cubic feet.

For tank 2, the height is given as 120 feet.

V2 = (1/2)π(15²)(120) = 31,416 cubic feet.

The maximum density is 0.000021142 killer whales per cubic foot

we can calculate the maximum number of killer whales as follows:

Number of killer whales = (Volume of main show tank) / (Density of killer whales)

Number of killer whales = 1,387,244 / 0.000021142 ≈ 65,606,197.

Therefore, the maximum number of killer whales allowed in the main show tank at any given time is 65,606,197

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Answer: You divide it, get your answer, move the decimal point to the right twice, and that's you're percent.

Step-by-step explanation:

1/4=.25

.25 > 25%

Answer:

The answer is 25%

Step-by-step explanation:

To change decimal to percentage multiply by 100

1/4×100%

=25%

The square root of y is not simplified and can be represented as:

y = √([tex]2^4 \times[/tex] 5) or y = 4√5.

To solve the proportion y/8 = 10/y for y, we can cross-multiply:

y [tex]\times[/tex] y = 8 [tex]\times[/tex]10

This simplifies to:

[tex]y^2[/tex] = 80

To solve for y, we can take the square root of both sides of the equation:

[tex]\sqrt{y^2[/tex] = √80

Since the square root of [tex]y^2[/tex] is simply y, we have:

y = √80

The square root of 80 can be further simplified by breaking it down into its prime factors. Since 80 can be expressed as 2 [tex]\times[/tex]2 [tex]\times[/tex]2 [tex]\times[/tex]2 [tex]\times[/tex]5, we can simplify the square root:

y = [tex]\sqrt(2 \times 2 \times 2 \times 2 \times 5)[/tex]

Therefore, the square root of y is not simplified and can be represented as:

y = [tex]\sqrt{(2^4 \times 5)[/tex] or y = 4√5.

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Answer:

[tex]y = \sqrt{80\\} =4\sqrt{5}[/tex]

Step-by-step explanation:

Answer:

Step-by-step explanation:

1 = 20cm

2 = 0.56cm^2

3 = 77.5m2

52)  The midpoint of the line segment is (-0.5, 9).

53) The midpoint of the line segment is (3, -8.5).

52) To find the midpoint of the line segment with endpoints (8,9) and (-9,9), we can use the midpoint formula. The midpoint formula states that the coordinates of the midpoint (x, y) are the average of the corresponding coordinates of the endpoints.

For the x-coordinate:

(x₁ + x₂) / 2 = (8 + (-9)) / 2 = (-1) / 2 = -0.5

For the y-coordinate:

(y₁ + y₂) / 2 = (9 + 9) / 2 = 18 / 2 = 9

Therefore, the midpoint of the line segment is (-0.5, 9).

53) To find the midpoint of the line segment with endpoints (8,-10) and (-2,-7), we apply the same process using the midpoint formula.

For the x-coordinate:

(x₁ + x₂) / 2 = (8 + (-2)) / 2 = 6 / 2 = 3

For the y-coordinate:

(y₁ + y₂) / 2 = (-10 + (-7)) / 2 = -17 / 2 = -8.5

Hence, the midpoint of the line segment is (3, -8.5).

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For the transformations of the triangle, we have that:

1. The translation of triangle ABC preserves side lengths and angles.

2. The dilation of triangle ABC preserves angles but not side lengths.

Hence the correct options are, respectively, C and B.

A translation involves shift left, shift right, shift down, or shift up, meaning that just the coordinates of the figure change, not the angles or the side lengths,

1. The translation of triangle ABC preserves side lengths and angles.

For a dilation, the coordinates of the vertices are multiplied by a constant, hence the side lengths change while the angles remain constant, thus:

2. The dilation of triangle ABC preserves angles but not side lengths.

Hence the correct options are, respectively, C and B.

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