A firecracker shoots up from a hill 150 feet high with an initial speed of 110 feet per second. Using the formula H(t) = −16t2 + vt + s, approximately how long will it take the firecracker to hit the ground?

Refresh me, is the starting height s or v?

Question

A firecracker shoots up from a hill 150 feet high with an initial speed of 110 feet per second. Using the formula H(t) = −16t2 + vt + s, approximately how long will it take the firecracker to hit the ground?

Refresh me, is the starting height s or v?

bahrom7893 · Answer

Starting height is 150

ja1 · Answer

ye ye but is the starting height S or V?

bahrom7893 · Answer

Starting height is H(0) = 150, so:
$$H(0) = -16*0^2+v*0 + s = 150$$
What do you think it is?

ja1 · Answer

AHHHH so S is the starting height? mkay thanks babe ;) I totally forgot lol