Mathematics

Lilly Dawson

29 May, 05:45

A firecracker shoots up from a hill 140 feet high, with an initial speed of 100 feet per sound. Using the formula H (t) = - 16t2 + be + s, approximately how long will it take the firecracker to hit the ground?

A.) 5 secs

B.) 7 secs

C.) 9 secs

D.) 11 secs

+4

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