Who Else Got College Boards Question Right For June 2nd?

Test Preparation
1

<p>I’m suprised it was marked medium, I thought hard for sure, but I knew the formula so it was pretty easy.</p>

2

<p>what was the question?</p>

3

<p>The stopping distance of a car is the number of feet that the car travels after the driver starts applying the brakes. The stopping distance of a certain car is directly proportional to the square of the speed of the car, in miles per hour, at the time the brakes are first applied. If the car’s stopping distance for an initial speed of 20 miles per hour is 17 feet, what is its stopping distance for an initial speed of 40 miles per hour?</p>

<p>A. 34 feet
B. 51 feet
C. 60 feet
D. 68 feet
E. 85 feet</p>

<p>I forgot the factor. I was thinking of a constant. D: But oh well.</p>

4

<p>Easy. Its just a proportion of x/s^2=y/v^2, with x and y being stopping distance, and s and v being speeds.</p>

<p>You know 17/400=y/1600, and algebraic isolation will find the answer.</p>

5

<p>its D…
20^2 = 17
40^2 = X</p>

<p>proportion!</p>

6

<p>I thought it was pretty easy. I think medium was just about right.</p>

7

<p>I wouldn’t classify multiplication by 4 as “hard.”</p>

8

<p>you would think it would be hard since only 40% of people got it right. because of that i kept trying to find dif. ways to solve it since i got “d” right away. I thought for sure i had done something wrong. lol</p>