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Mathematics 7 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

please help

OpenStudy (anonymous):

im new and I need help

OpenStudy (loser66):

replace s = 140, v = 100, let the whole thing =0, solve for t

OpenStudy (anonymous):

ok is that all I do

OpenStudy (loser66):

show work, please.

OpenStudy (anonymous):

16t^2+vt+s 16t^2+100t+140=0 16^2+100t=140 is this right?

OpenStudy (anonymous):

??

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