Question

HELP!
A ball is thrown directly up in the air from a height of 5 feet with an initial velocity of 60 ft/s. Ignoring air resistance, how long until the ball hits the ground? Use the formula h=-16t^2+60t+5 where h is the height of the ball in feet and t is the time in seconds since it is thrown. Round your answer to the nearest tenth.
A.2.1 seconds
B.3.8 seconds
C.2.4 seconds
D1.8 seconds

Answer 1

help

Answer 2

You have to use the quadratic formula to solve this equation. I'll give you that as a hint.

Answer 3

nm to late

Answer 4

http://prntscr.com/5dcuch

Answer 5

Only knowing the answer will not help you for a test, trust me.

Answer 6

well i have bio and it has math in it so stupid i hate math so i try not to do it blah blah watever

Answer 7

Alright, that's fine then. :p