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OpenStudy (hellokitty17):
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OpenStudy (hellokitty17):
A firecracker shoots up from a hill 145 feet high, with an initial speed of 80 feet per second. Using the formula H(t) = -16t2 + vt + s, approximately how long will it take the firecracker to hit the ground? 13 seconds 11 seconds Nine seconds Six seconds
oregonduck (oregonduck):
six seconds
OpenStudy (anonymous):
yes
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