Because of a Storm, Ground Controllers Instruct the Pilot of a Plane

Multiple Choice

Because of a storm, ground controllers instruct the pilot of a plane flying at an altitude of 3.2 miles to make a turn and climb to an altitude of 3.4 miles. The model for the path of the plane during this maneuver is where t is the time in hours and r is the distance in miles. Determine the speed of the plane. Round your answer to the nearest integer.

A) 201 mi/h
B) 64 mi/h
C) 173 mi/h
D) 137 mi/h
E) 255 mi/h