Question

can somebody check if this stuff is right? :)

Answer 1

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?

Eight seconds
Nine seconds
10 seconds
11 seconds

Answer 2

c?(idk tho)

Answer 3

you know that when the ball hits the ground the height is 0, however you have some missing parts of your equation


using the initial values they give you

the height at t=0 is 150 [h(0)=150]

and plugging into the equation you should get s

Answer 4

? you should get s so my answer was wrong
i noted that i wasn't sure