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OpenStudy (anonymous):
A firecracker shoots up from a hill 160 feet high with an initial speed of 90 feet per second. Using the formula H(t) = −16t^2 + vt + s, approximately how long will it take the firecracker to hit the ground?
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OpenStudy (lgbasallote):
it will hit the ground when H(t) = 0 does that help?
OpenStudy (lgbasallote):
assuming H(t) is a function of the height
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