Question

H=15+23t-5t^2
how long does it take for the rocket to pass a window 10 m above ground?

Answer 1

i really need help

Answer 2

test tomorrow

Answer 3

What is H?

Answer 4

the hight and t the time

Answer 5

15+23t-5t^2 = 10
5t^2-23t-5=0
use quadratic formula ...

Answer 6

would there be 2 answers?

Answer 7

I still don't understand the problem. @RadEn could you explain me, please? :p

Answer 8

maybe one of be positive and the other be negative, miss for negative value of t