A formula for calculating the distance, $d$, one can see from an airplane to the horizon on a clear day is $d=1.22 x^{1 / 2}$, 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 25,000 feet? Round your answer to the nearest tenth mile, if necessary.
A) 192.9 miles
B) 174.6 miles
C) 1525 miles
D) 15,250 miles

Question

Quizplus · Accepted Answer

The formula given is $d=1.22x^{1/2}$. Substituting $x=25,000$ feet into the formula gives $d=1.22(25,000)^{1/2}$. Calculating the square root of 25,000 gives 158.11, and multiplying that by 1.22 gives approximately 192.9 miles.

A Formula for Calculating the Distance ddd , One Can See from an Airplane to the Horizon

A Formula for Calculating the Distance $d$ , One Can See from an Airplane to the Horizon