Solve the Problem $$\mathrm { d } = 1.22 \mathrm { x } ^ { 1 / 2 }$$

Multiple Choice

Solve the problem.
-A formula for calculating the distance, d, one can see from an airplane to the horizon on a clear day is $$\mathrm { d } = 1.22 \mathrm { x } ^ { 1 / 2 }$$ where x is the altitude of the plane in feet and d is given in miles. How far can
One see in a plane flying at 28,000 feet? Round your answer to the nearest tenth mile, if necessary.

A) 184.8 mi
B) 204.1 mi
C) 17,080 mi
D) 1708 mi