Question

Question Number 35 of 40 - Algebra IIThe length, s, in feet) of the skid mark left by an automobile traveling at r miles per hour can be approximated bythe relation r = 2/5s. If a car is going 80 miles per hour when the brakes are applied, about how many feet longwould the skid mark be?640 ft320 ft410 ft1,280 ft

Answer 1

Given:

r = 2/5s

Required:

To calculate which would be the skid mark

Explanation:

$\begin{gathered} 80=2\sqrt{5s} \\ \\ 40=\sqrt{5s} \\ \\ 1600=5s \\ \\ s=320 \end{gathered}$

Required answer:

Option B(320)