Advanced Math · Variation

Practice · Direct, Inverse, and Joint Variations

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Question 1 of 5Solve it — one move at a time

The distance it takes an automobile to stop varies directly as the square of its speed. If the stopping distance of a car traveling at 40 miles per hour is 320 feet, what is the stopping distance of a car traveling at 50 miles per hour?

Work through it one move at a time.

Set up

d = ks^{2}

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