I think it is 20 m
Hope this help you
<span>h = 0 when it hits the ground, therefore:
-16t^2 + 48t = 0
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Factor out -16t
-16t(t + 3) = 0
:
Two solutions
t = 0, when it begins it's upward journey
and
t = 3 sec, when it returns to earth
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Step-by-step explanation:
A≈3.14mi²