use addition properties and strategies to find the sum 13 + 26 + 54=

Answers

Answer 1

Answer:

93

Step-by-step explanation:

13 + 26 = 39

39 + 54 = 93

Answer 2
The answer is 93 (hope this helps)

Related Questions

Determine the intercepts of the line.

yy-intercept:
(
(left parenthesis

,
,comma
)
)right parenthesis

xx-intercept:
(
(left parenthesis

,
,comma
)
)right parenthesis
A coordinate plane. The x- and y-axes each scale by one-tenth. A graph of a line intersects the points zero, four-tenths and three-tenths, zero.

Answers

rubs is the blue apple grape urus banana rasberry snow cone

A certain disease has an incidence rate of 0.3%. If the false negative rate is 6% and the false positive rate is 4%, compute the probability that a person who tests positive actually has the disease.

Answers

The probability that a person who tests positive actually has the disease is 0.012%

How to determine the probability?

From the question, we have the following parameters that can be used in our computation:

Incidence rate = 0.3%False negative rate = 6%False positive rate = 4%

The probability that a person who tests positive actually has the disease is represented as

Probability = Incidence rate * False positive rate

Substitute the known values in the above equation, so, we have the following representation

Probability = 0.3% * 4%

Evaluate the products

Probability = 0.012%

Hence, the probability is 0.012%

Read more about probability at

https://brainly.com/question/251701

#SPJ1

Mike and Felix are collecting newspapers for a recycling project. Mike collected 14.66 pounds and Felix collected 11.5 pounds. Together, how many pounds of newspapers did they collect? A. 25.71 pounds B. 26.16 pounds C. 25.16 pounds D. 26.1 pounds

Answers

Answer:

26.16

Step-by-step explanation:

14.66 + 11.5 = 26.16

The total weight of the newspapers that are collected for recycling is given by 26.16 pounds.

What is the BODMAS rule?

According to the BODMAS rule, the brackets have to be solved first followed by powers or roots (i.e. of), then Division, Multiplication, Addition, and at the end Subtraction. Solving any expression is considered correct only if the BODMAS rule or the PEMDAS rule is followed to solve it.

Given here:  Mike collected 14.66 pounds and Felix collected 11.5 pounds.

We know, Addition is used to figure out the total of two or more numbers. Subtraction is used to find the difference between two numbers.

Thus the total pounds of newspaper in the recycling project is given by

W=14.66+11.5

  =26.16 pounds.

Hence, The total weight of the newspapers that are collected for recycling is given by 26.16 pounds.

Learn more about BODMAS rule here:

https://brainly.com/question/29795897

#SPJ2

Los 1600 euros de alquiler de un terreno se reparten entre tres ganaderos que llevan alli a pastar sus ovejas. Como no tienen el mismo número de ovejas, deciden pagar proporcionalmente al número de ovejas de cada uno. Si el primero tiene 120 Ovejas,el segundo 72 y el tercero 68. ¿ Cuánto paga cada uno?

Answers

So, each farmer pays the following amounts: The first farmer pays 738.40 euros. The second farmer pays 443.04 euros. The third farmer pays 418.56 euros

What is proportion?

Proportion refers to the equality of two ratios. In other words, when two ratios are set equal to each other, they form a proportion. A proportion is typically written in the form of two fractions separated by an equals sign, such as a/b = c/d. Proportions are commonly used in mathematics to solve problems involving ratios and proportions, such as finding missing values or scaling up or down a given quantity.

Here,

To find out how much each farmer pays, we need to determine the proportion of the total rent that each farmer owes based on the number of sheep they have. First, we need to find the total number of sheep:

120 + 72 + 68 = 260

The first farmer has 120 sheep, which is 46.15% of the total number of sheep (120/260). Therefore, the first farmer owes 46.15% of the rent:

0.4615 x 1600 = 738.40 euros

Similarly, the second farmer has 72 sheep, which is 27.69% of the total number of sheep (72/260). Therefore, the second farmer owes 27.69% of the rent:

0.2769 x 1600 = 443.04 euros

The third farmer has 68 sheep, which is 26.15% of the total number of sheep (68/260). Therefore, the third farmer owes 26.15% of the rent:

0.2615 x 1600 = 418.56 euros

To know more about proportion,

https://brainly.com/question/29474065

#SPJ1

Complete question:

The rent of 1600 euros for a piece of land is divided among three farmers who graze their sheep there. As they do not have the same number of sheep, they decide to pay proportionally according to the number of sheep each has. If the first one has 120 sheep, the second 72, and the third 68. How much does each one pay?

Given y=x, what is the constant of proportionality?

Answers

Answer:

1

Step-by-step explanation:

The constant of proportionality when the equation is y = ax is a.

There is nothing written there so a is assumed to be 1.

If y = 3.443

Then the constant of proportionality is 3.443, which is the value of a.

Solve the inequality and graph the solution on the line provided. 6x-6<-30

Answers

The solution to the inequality 6x - 6 < -30 is x < -4, and it is graphically represented as a closed circle at -4 and shading to the left of -4 on the number line.

To solve the inequality 6x - 6 < -30, we can follow these steps:

Step 1: Add 6 to both sides of the inequality to isolate the variable:

6x - 6 + 6 < -30 + 6

6x < -24

Step 2: Divide both sides of the inequality by 6 to solve for x:

(6x)/6 < (-24)/6

x < -4

The solution to the inequality is x < -4. This means that any value of x less than -4 will satisfy the inequality.

To graph the solution on the number line, we represent -4 as a closed circle (since it is not included in the solution) and shade the region to the left of -4 to indicate all values less than -4.

On the number line, mark a point at -4 with a closed circle:

<--------●-----------------

Then, shade the region to the left of -4:

<--------●================

The shaded region represents the solution to the inequality x < -4.

For more such question on inequality  visit:

https://brainly.com/question/30238989

#SPJ8

6. Ben transformed a figure from quadrant IV to quadrant I. The pre-image
and image are congruent figures, but the orientation of the figure changed.
Which could be the transformation Ben used? *

Answers

Answ  reflection over x axis or a translation

Step-by-step explanation:

Dividing the sum of (7/8) (15/4) (1/12) by their multiplication gives _________

Answers

The Division of the sum of (7/8), (15/4), and (1/12) by their multiplication is (2712/168).

To find the division of the sum of (7/8), (15/4), and (1/12) by their multiplication, we first need to calculate the sum and multiplication of the given fractions.

The sum of the fractions is:

(7/8) + (15/4) + (1/12)

To add these fractions, we need a common denominator. The least common multiple of 8, 4, and 12 is 24. Let's convert each fraction to have a denominator of 24:

(7/8) = (21/24)

(15/4) = (90/24)

(1/12) = (2/24)

Now we can add the fractions:

(21/24) + (90/24) + (2/24) = (113/24)

The multiplication of the fractions is:

(7/8) * (15/4) * (1/12)

To multiply fractions, we multiply the numerators and denominators:

(7*15*1) / (8*4*12) = (7/96)

Now we can divide the sum of the fractions by their multiplication:

(113/24) / (7/96)

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction:

(113/24) * (96/7) = (2712/168)

Therefore, the division of the sum of (7/8), (15/4), and (1/12) by their multiplication is (2712/168).

For more questions on Division .

https://brainly.com/question/30340100

#SPJ8

Use the relationship represented in this Venn diagram to identify the true statement.
A. All trapezoids are rhombuses
B. All rhombuses are trapezoids
C. No trapezoids are rhombuses
D. No rhombuses are trapezoids

Answers

The true statement based on the relationship depicted in the Venn diagram is that no rhombuses are trapezoids (option D).

To identify the true statement using the relationship represented in the Venn diagram, we need to analyze the overlapping regions and the properties of the shapes involved.

A trapezoid is a quadrilateral with at least one pair of parallel sides, while a rhombus is a quadrilateral with all sides of equal length. Let's evaluate the options:

A. All trapezoids are rhombuses: This statement is not true based on the diagram. The overlapping region between the trapezoids and rhombuses shows that there are trapezoids that are not rhombuses. Therefore, option A is incorrect.

B. All rhombuses are trapezoids: This statement is true based on the diagram. The entire region representing rhombuses is also included within the region representing trapezoids. Every rhombus can be considered a trapezoid because it has at least one pair of parallel sides. Thus, option B is correct.

C. No trapezoids are rhombuses: This statement is not true based on the diagram. The overlapping region indicates that there are trapezoids that are indeed rhombuses. Therefore, option C is incorrect.

D. No rhombuses are trapezoids: This statement is true based on the diagram. There is no overlap between the regions representing rhombuses and trapezoids, implying that no rhombus can be considered a trapezoid. Hence, option D is correct.

for such more question on trapezoids

https://brainly.com/question/22351006

#SPJ8

please help!!!!!!!!!!!

please help!!!!!!!!!!!

Answers

Answer:

pumpkin: 5

witch: 10

leaf: 50

bat: 20

ghost: 60

Answer:

Bat: 20

Pumpkin: 5

Ghost: 60

Leaf: 50

Witch: 10

Which numbers below are odd?
A. 4271
B. 7966
C. 787
D. 288
E. 8113
F. 985

Answers

Answer:
A. 4271
C. 787
E. 8113
F. 985

(They all end in an odd number.)

What is the value of the digit in the ones place?
2,615
A. 50
B. 5
OC. 2,000
OD. 100

Answers

A.50 i theorized the anwser w

The value of y varies directly with x. If x = 7, then y = 84 . What is the value of x when y = 60 ?

Answers

Answer:

if y=60 then x=5

Step-by-step explanation:

im in college Algebra if you need help just ask

A cylinder has a height of 10 millimeters and a radius of 3 millimeters. What is its volume?
Use - 3.14 and round your answer to the nearest hundredth.

Answers

Answer:

18312.5mm³

Step-by-step explanation:

Given parameters:

Height of cylinder  = 18mm

radius  = 18mm

Unknown:

Volume of the cylinder = ?

Solution:

The volume of cylinder is given as;

 Volume  = π r ² h

Insert the given parameters and solve;

 Volume  = 3.14 x 18² x 18

 Volume  = 18312.5mm³

Answer:

282.6

Step-by-step explanation:

volume= h*(pie*r^2)

3*3=9

9*pie=28.26

10*28.6=282.6

In 16 years' time Jim will be three times his current age. How old will Jim be in 4 years' time?​

Answers

Answer:

12

Step-by-step explanation:

Jim's currect age is x.

In 16 years, JIm will be x + 16.

In 4 years, Jim will be x + 4.

x + 16 = 3x

-2x = -16

x = 8

x + 4 = 8 + 4 = 12

A math class had 27 students in it. Of those, 14 are also enrolled in History 17 are enrolled in English. What is the minimum % of the students in class who are also enrolled in History and English?

Answers

Answer:

14.81%

Step-by-step explanation:Known :A math class has 27 students14 of them enrolled in History17 of them enrolled in English

Asked :The minimum % of students in the class who are also enrolled in History and English

Solution :

Let's consider there are zero students who enrolled nothing (because the question asked the minimum) and x = the amount of students who enrolled both History and English.

x = (14 + 17) - 27

x = 31 - 27

x = 4

Now, we can easily calculate the number of students who enrolled in both History and English by percentage. Let's consider that y = the number of students who enrolled in both History and English by percentage.

y = 4/27

y = 14.81%

Conclusion :

The number of students who enrolled in both History and English by percentage is 14.81%

Please help!!

Determine whether the inverse of F(x) is a function.

Please help!! Determine whether the inverse of F(x) is a function.

Answers

Answer:

f⁻¹(x) is not a function

Step-by-step explanation:

A function can only have one output value per input value. Multiple input values can have the same output value (horizontally), but multiple output values cannot have the same input value (vertically).

For example:

\(f(x)=x^2\\f(-2)=-2^2=4\\f(2)=2^2=4\)

This function has 2 inputs with the same output. That is valid.

However, if you take the inverse of that function:

\(f^{-1}(x)=\sqrt{x}\\f^{-1}(2)=\sqrt{2}=1.414\\f^{-1}(-2)=\sqrt{-2}=\sqrt{2}i\)

f⁻¹(-2) is an imaginary number. It doesn't exist, and so the inverse of f(x) is still a function because there is no vertical overlap. This is shown more clearly in the attached image.

The graph of the inverse of a function is just mirrored over y = x. This is also shown in the attached image. Any horizontal overlap the function may have becomes vertical overlap, and if those values still exist, the function cannot be a function.

In the function in your question, f(x) has some horizontal overlap around x = 0 and x = 8. If this was mirrored over y = x, the function at x = 8 would have 2 outputs, y = 0 and y = 8. As a result, it cannot be a function.

Let me know if I need to explain any part of that more clearly.

Please help!! Determine whether the inverse of F(x) is a function.

An arrow is shot from 3 ft above the top of a hill with a vertical upward velocity of 108 ​ft/s. If it strikes the plain below after 9.5 ​s, how high is the​ hill?
If the arrow is launched at t​0, then write an equation describing velocity as a function of time?

Answers

The height of the hill is approximately 25.73 ft. Where v0 is the initial velocity (108 ft/s), g is the acceleration due to gravity \((-32.2 ft/s^2)\),

To find the height of the hill, we can use the formula for the vertical position of an object under constant acceleration:

h = h0 + v0t + 1/2at^2

where h is the final height, h0 is the initial height, v0 is the initial velocity, t is the time, and a is the acceleration due to gravity (-32.2 ft/s^2).

In this case, we are given that the initial height h0 is 3 ft, the initial velocity v0 is 108 ft/s, and the time t is 9.5 s. We want to find the height of the hill, which we can denote as h_hill. The final height is the height of the plain, which we can denote as h_plain and assume is zero.

At the highest point of its trajectory, the arrow will have zero vertical velocity, since it will have stopped rising and just started to fall. So we can set the velocity to zero and solve for the time it takes for that to occur. Using the formula for velocity under constant acceleration:

v = v0 + at

we can solve for t when v = 0, h0 = 3 ft, v0 = 108 ft/s, and a = -32.2 ft/s^2:

0 = 108 - 32.2t

t = 108/32.2 ≈ 3.35 s

Thus, it takes the arrow approximately 3.35 s to reach the top of its trajectory.

Using the formula for the height of an object at a given time, we can find the height of the hill by subtracting the height of the arrow at the top of its trajectory from the initial height:

h_hill = h0 + v0t + 1/2at^2 - h_top

where h_top is the height of the arrow at the top of its trajectory. We can find h_top using the formula for the height of an object at the maximum height of its trajectory:

h_top = h0 + v0^2/2a

Plugging in the given values, we get:

h_top = 3 + (108^2)/(2*(-32.2)) ≈ 196.78 ft

Plugging this into the first equation, we get:

h_hill = 3 + 108(3.35) + 1/2(-32.2)(3.35)^2 - 196.78

h_hill ≈ 25.73 ft

If the arrow is launched at t0, the equation describing velocity as a function of time would be:

v(t) = v0 - gt

For such more questions on velocity

https://brainly.com/question/25749514

#SPJ8

Diven {x) = 3x- 1 and 9(x) = 2x-3, for which value of x does g(X) = {2)?

Answers

The calculated value of x at g(x) = 2 is x = 2.5

How to determine the value of x at g(x) = 2

from the question, we have the following parameters that can be used in our computation:

f(x) = 3x - 1

Also, we have

g(x) = 2x - 3

When g(x) - 2, we have

2x - 3 = 2

So, we have

2x = 5

Divide by 2

x = 2.5

Hence, the value of x at g(x) = 2 is x = 2.5

Read more about function at

https://brainly.com/question/27915724

#SPJ1

an art gallery is selling replicas of some famous art work. a copy of the art work is dilated by a scale factor of 1/3 to create a replica of the original piece. if the area of some original artwork was 12 square feet what will be the area of the replica?

Answers

Answer:

4/3 square feet.

Step-by-step explanation:

To find the area of the replica, you need to use a formula that relates the area of the original figure and the area of the dilated figure by the scale factor1. The formula is:

Area of dilated figure = Area of original figure x (Scale factor)^2

In this case, the area of the original artwork is 12 square feet and the scale factor is 1/3. So, we plug these values into the formula and get:

Area of replica = 12 x (1/3)^2

Area of replica = 12 x 1/9

Area of replica = 4/3

So, the area of the replica is 4/3 square feet.

Hope this helps :)

Find the height of the tower using the information given in the illustration.

Find the height of the tower using the information given in the illustration.

Answers

using SOH CAH TOA

Tan 85.144 =h/130

h=tan 85.144*130

h=1530.19 fr

Find the height of the tower using the information given in the illustration.

Consider the line 5x+2y=−4. What is the equation of the line parallel to the given line that passes through the point (−2, 6) in slope-intercept form? Enter your answer by filling in the boxes to complete the equation.

Answers

Answer:

  y = -5/2x +1

Step-by-step explanation:

You want the slope-intercept form equation for the line through the point (-2, 6) that is parallel to 5x +2y = -4.

Parallel line

The equation of a parallel line can be the same as the given equation, except for the constant. The new constant can be found by substituting the given point coordinates:

  5(-2) +2(6) = c

  -10 +12 = c

  2 = c

Now we know the equation of the parallel line can be written as ...

  5x +2y = 2

Slope-intercept form

Solving for y puts this in slope-intercept form:

  2y = -5x +2 . . . . . . . . subtract 5x

  y = -5/2x +1 . . . . . . . . divide by 2

We don't know what your boxes look like, but we can separate the numbers to make it look like this:

  \(\boxed{y=\dfrac{-5}{2}x+1}\)

#95141404393

Consider the line 5x+2y=4. What is the equation of the line parallel to the given line that passes through

A population of 100 insects tripled in size every month. Write a function formula to represent the insect population after x months

Answers

Answer:

3x+100

Step-by-step explanation:

Hi!

A function formula is f(x) = 100 (3) ^ x

Hope this helps !



Use the distribute property to determine which expression is equivalent to 3(4x+2t).

Use the distribute property to determine which expression is equivalent to 3(4x+2t).

Answers

Answer:

12x + 6t

Step-by-step explanation:

Since 3 is on the outside of the parentheses, multiply 3 times 4 to get 12 and 3 times 2 to get 6. Then put in the variable

Answer:

The expression would be: 12x + 6t

Step-by-step explanation:

Use the distribute property to determine which expression is equivalent to 3(4x+2t).

() What is 4 divided by 9?

Answers

4/9 = 0.444444444444444

Answer:

9

Step-by-step explanation:

When factored completely, the expression 6x3 – 5x2 – 13x + 12 is
equivalent to
a. (2 – 1)(2x - 3)(3x + 4)
b. (x + 1)(2x + 3)(3x + 4)
c. (x + 1)(2x − 3)(3x – 4)
d. (x - 1)(2x + 3)(3x – 4)

Answers

Answer:

d. (x - 1)(2x + 3)(3x - 4)

Step-by-step explanation:

6x³ - 5x² - 13x + 12

6x³ + x² - 12x - 6x² - x + 12

x(6x² + x - 12) - 1(6x² + x - 12)

(x - 1)(6x² + x - 12)

(x - 1)(6x² + 9x - 8x - 12)

(x - 1)(3x(2x + 3) - 4(2x + 3))

(x - 1)(2x - 3)(3x - 4)

Answer:

( x - 1 )( 2x + 3 )( 3x - 4 )

Step-by-step explanation:

Hope this helps!

Can somebody help me please is jut one problem

Can somebody help me please is jut one problem

Answers

a) The definition of the composite function is: \((f \circ g)(x) = \frac{6}{12 + 2x}\)

b) The domain of the composite function is: (-∞, -6) U (-6, -2) U (-2,0) U (0, ∞).

How to define the composite function of f(x) and g(x)?

The composite function of f(x) and g(x) is given by the function rule presented as follows:

(f ∘ g)(x) = f(g(x)).

For the composition of two functions, we have that the output of the inner function, which in this example is given by g(x), serves as the input of the outer function, which in this example is given by f(x).

The functions for this problem are given as follows:

f(x) = x/(x + 2).g(x) = 6/x.

Hence the composite function is obtained as follows:

\((f \circ g)(x) = f(\left\frac{6}{x}\right)\)

\((f \circ g)(x) = \frac{\frac{6}{x}}{\frac{6}{x} + 2}\)

\((f \circ g)(x) = \frac{\frac{6}{x}}{\frac{12 + 2x}{x}}\)

\((f \circ g)(x) = \frac{6}{12 + 2x}\)

The domain is all real values except x = 0, x = -2 and x = -6, as f(x) is not defined at x = -2 and g(x) is not defined at x = 0 and the composite function is not defined at x = -6, hence the interval notation is:

(-∞, -6) U (-6, -2) U (-2,0) U (0, ∞).

More can be learned about composite functions at https://brainly.com/question/10687170

#SPJ1

what is the pythagoras theorum in terms of shakespear?

Answers

Answer:*

Step-by-step explanation:


Wesley hiked 7 7/8 miles in 3 1/2 hours. How many miles did he hike per hour?

Answers

7.875 miles/ 3.5 hours = 2.25 miles/hour

Answer:

2.25 ml/hr

Step-by-step explanation:

7 7/8 = 7.875

3 1/2 = 3.5

7.785/3.5 = 2.25

Prove that (1234) is not the product of 3-cycles. Generalize

Answers

Answer:

The permutation (1234) is not a 3-cycle

Step-by-step explanation:

To prove that (1234) is not the product of 3-cycles, we can consider the possible 3-cycles that could be used to generate (1234). If we use the 3-cycle (123), we get the permutation (1324). If we use the 3-cycle (124), we get the permutation (1432). If we use the 3-cycle (134), we get the permutation (1423). None of these permutations is equal to (1234), so (1234) cannot be the product of 3-cycles.
To generalize this result, we can consider any permutation of n elements. If the permutation involves fewer than three elements, it cannot be the product of 3-cycles because a 3-cycle involves three elements. If the permutation involves more than three elements, it cannot be the product of 3-cycles because a 3-cycle cannot rearrange more than three elements. Therefore, any permutation of n elements that involves more or fewer than three elements cannot be the product of 3-cycles.

If you have any further questions let me know:))

Other Questions
Rolling through the field in the dead of winter is an example of which literary device. Find the output, h, when the input, x, is -18 h=17+x/6 write as many mathematical expressions or equations as you can about the image include a fraction, a decimal number, or a percentage in each. Fundraiser our Goal 250,000 can someone help me A circle has a radius of 12.6 cm. What is the exact length of an arc formed by a central angle measuring 100?8.5 cm7 cm44 cm79.12 cm Systems a and b contain the same substance. if system a is a saturated vapor, and has the same pressure as system b, but system b has a higher enthalpy value than a, what phase is system b in? Why did Confederate soldiers surrender at Port Hudson? Why is the surrender of Port Hudson and Vicksburg significant? Considering only the values of for which the expression is defined, which of the following is equivalent to the expression below?cos()tan()cscSelect the correct answer below:sin1sin1 find the cube root of 5832 marissa's bmi is 26.9. according to this information, marissa is in the ________ bmi range. Explain a recent within the past 6 months event, which can be local, state, or national, that illustrates three major core concepts of public administration, such as bureaucracy, representative democracy, federalism, bureaucratic power, transparency, and accountability.Please do the following:- Identify and explain at least four major concepts of public administration that relate to your chosen event.- Identify specific ethical violations sometimes encountered in a public venue.- Assesses the event and describe risks to the institution.- Explain which event places the organization at the most risk.- Examine four ethical issues, such as bribery, internal theft, conflict of interest, or some other issues.- Assess the violations extracted from the Online Library.- Develop a paper on the issues, addressing the ethical dilemmas, and evaluating the ethical codes.- Examine four or more ethical codes that were violated and explain how to resolve each issue ethically.- Please research your event and cite at least four credible sources while also evaluating the credibility of your sources. Be sure to define the concepts completely and use examples to illustrate your points. Angle A and angle B are complementary angles. If ma = 4x and mb = 3x +13, what is the measure of the smaller angle? click one underlined phrase on these pages that uses a metaphor to suggest that unity is a concept others will attack A curtain pole is offered with a choice of solid finials (the ends of the curtain rail): cylindrical or spherical. They are shown in Figure Q23. The radii of the cylinder and the sphere are both 6 cm summary of hidden figures chapter number 5 In a closed system, what happens to the total energy of the system as energy conversion takes place? firms are often constrained from pursing goals other than profit maximization by the pressure of competition and threat of acquisition. true or false An English teenager is going to stay with your family for two months on a cultural homestay programme. Complete a letter to inform him / her of the rules in your family. Write between 160-180 words, using the suggested ideas in the list above. Alejandro made an error in the steps below when determining the equation of the line that is perpendicular to the line 4x 3y = 8 and passes through the point (3, 2). DESPERATE WILL GIVE BRAINLIST AND THANKSWhich area was not annexed by Germany?Question 3 options:East PrussiaAlbaniaAustriaRhineland Compared with a car moving at some original speed, how much work must the brakes of a car supply to stop a car that is moving twice as fast? how will the stopping distances compare?.