Solve the Problem
-Each Tire of an Automobile Has a Radius

Multiple Choice

Solve the problem
-Each tire of an automobile has a radius of $2.5$ feet. How many revolutions per minute (rpm) does a tire make when the automobile is traveling at a speed of 115 feet per sec? Round your answer to the nearest tenth.

A) $439.3 \mathrm { rpm }$
B) $2745.4 \mathrm { rpm }$
C) $7.3 \mathrm { rpm }$
D) $878.5 \mathrm { rpm }$