Brit7377
Brit7377
17-07-2017
Mathematics
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Please help to the best of ur ability plz
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nnn6nnn
17-07-2017
She went 3.5 feet per second down for 90 seconds
3.5*90 = 315 feet below
2.2*30 = 66 feet up
315-66 = 249 feet below.
So, she must go up at 4.8 feet per second.
249/4.8 =
51.875 seconds
52 seconds when rounded
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