Solve the Problem $d$ (In Miles) That an Observer Can See on a Clear

question 115

Multiple Choice

Solve the problem.
-The distance $d$ (in miles) that an observer can see on a clear day is approximated by $d = \frac { 49 } { 40 } \sqrt { h }$ , where $h$ is the height of the observer in feet. It Rita can see $24.5 \mathrm { mi }$ , how far above ground is her eye level?

• A) \(400 \mathrm { ft }\)
• B) \(40 \mathrm { ft }\)
• C) \(20 \mathrm { ft }\)
• D) \(6 \mathrm { ft }\)