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If an average-sized man with a parachute jumps from an airplane, he will fall 12.5(0.2^t-1) +20t feet in t seconds. How long will it take him to fall 140 feet? (Round your answer to two decimal places.)

 Aug 9, 2021
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All you need to do is this:

140 = 12.5( 0.2t -1) + 20t            can you solve this for 't' ?

 Aug 9, 2021

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