A firecracker shoots up from a hill 165 feet high with an initial speed of 110 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground

Question

anonymous · Answer

solve 
$$-16t^2+110t+165=0$$ for t

anonymous · Answer

i would use the quadratic formula and a calculator

anonymous · Answer

well actually i would just cheat http://www.wolframalpha.com/input/?i=16t^2-110t-165%3D0 looks like about 8.14 seconds

anonymous · Answer

k thx

anonymous · Answer

yw