An Airplane Flying at an Altitude of 5 Miles Passes

question 76

Multiple Choice

An airplane flying at an altitude of 5 miles passes directly over a radar antenna. When the airplane is 50 miles away (s = 50) , the radar detects that the distance s is changing at a rate of 280 miles per hour. What is the speed of the airplane? Round your answer to the nearest integer.

• A)281 mi/hr
• B)271 mi/hr
• C)563 mi/hr
• D)141 mi/hr
• E)135 mi/hr

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