Express the Angular Speed in Radians Per Second $0.48$ Feet Is Lowered into the Water

Multiple Choice

Express the angular speed in radians per second.
-To approximate the speed of a river, a circular paddle wheel with radius $0.48$ feet is lowered into the water. If the current causes the wheel to rotate at a speed of 13 revolutions per minute, what is the speed of the current? Express the answer in miles per hour rounded to two decimal places, if necessary.

A) $0.45$ miles per hour
B) $0.07$ miles per hour
C) $39.21$ miles per hour
D) $0.22$ miles per hour