Question

Please Hurry !!

The speed s (in miles per hour of a car driving on wet asphalt can be given by s = 3 square root d, where d is the stopping distance (in feet). What is the approximate stopping distance of a car traveling 80 miles per hour? Round your answer to the nearest hundredth.

Answer 1

d = 711 miles

Explanation:

The speed s of the car is given by :

`s=3√(d)` ...(1)

Where

d is the stopping distance

We need to find the stopping distance of a car travelling at 80 mph.

Rearranging equation (1) for d.

`s^2=9d\\\\d=(s^2)/(9)\\\\d=(80^2)/(9)\\\\d=711.1\ miles`

or

d = 711 miles

So, the required stopping distance is 711 miles.