The equation h=-16t²+56t models the height (h) in feet of a golf ball (t) seconds after it was hit what do i do next a find the values of t for which h=0 or B when the ball 40 ft above the ground?

Question

The equation h=-16t²+56t models the height (h) in feet of a golf ball (t) seconds after it was hit  what do i do next a find the values of t for which h=0 or B when the ball 40 ft above the ground?

anonymous · Answer

just plug in 0 and 40. then you'll find t

anonymous · Answer

Sorry, plug those values for h. so

0=-16t^2+56t
40=-16t^2+56t

anonymous · Answer

no i need to know what to do next i have two choices (A) find the values of t for which h=0 or (B) when the ball 40 ft above the ground?

anonymous · Answer

As suggested by ohcluap above, you get two quadratic equations
Solving them will give you values of t
Ignore negative value to t as time cannot be negative

anonymous · Answer

Hope that clears it up..........