Karl starts the engine on his small private airplane. the engine drives a propeller with a radius of 9 feet and its centerline 12.5 feet above the ground. at idle, the propeller rotates at a constant speed of approximately 750 revolutions per minute. the height of one propeller tip as a function of time is given by h = 12.5 + 9 sin(750t), where h is the height in feet and t is the time in minutes. find h when t = 3.5 minutes.

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

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