Question

A ball is thrown into the air with the in initial upward velocity of 45 ft/s. It's height (h) in feet after t seconds is given by the function h=- -16t^2+45t+6. After about how many seconds will the ball hit the ground?
a. 3
b. 4
c. 5
d. 6

Answer 1

Wow, i just finished do this prob! =)
What can i explain for you to understand this? =)

Answer 2

*doing

Answer 3

i just need to know how you get the seconds for the answer