The stopping distance, d ( in feet) for a truck moving at a velocity (speed) v miles per hour is modeled by the equation: d=0.04v^2+1.1v what is the speed of the truck if it takes 100 feet to stop? a. 12.5 mph c. 18 mph b. 38 mph d. 13 mph

b. 38 mph

Step-by-step explanation:

Here, the given equation that shows the stopping distance ( in feet ) when the truck is moving with the speed of v miles per hour,

If d = 100,

By adding the square of the half of the coefficient of v on both sides,

We get,

Since, the speed can not be negative,

Hence, the approximate speed of truck would be 38 mph.

Option 'b' is correct.