3.7 Exercise 73

A car travels at a constant speed of 50 miles per hour. The distance the car travels in miles is a function of time, $t ,$ in hours given by $d \left(t\right) = 50 t .$ Find the inverse function by expressing the time of travel in terms of the distance traveled. Call this function $t \left(d\right) .$ Find $t \left(180\right)$ and interpret its meaning.