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OpenStudy (anonymous):
A firecracker shoots up from a hill 155 feet high with an initial speed of 100 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground. A. 7.5 seconds B. 7.9 seconds C. 7.1 seconds D. 7.8 seconds
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OpenStudy (anonymous):
A. 7.5 Seconds
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