Question 91991
Find the time required for an object to fall to the ground form a building that is 1400 ft. high.
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h(t) = -16t^2+1400
When it hits the ground its height is zero.
-16t^2 + 1400 = 0
16t^2 = 1400
t^2 = 1400/16
t = sqrt(1400/16)
t = 9.354... seconds
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Cheers,
Stan H.