Fred throws a ball using h=-16t^2+10t+8

How long is the ball in the air??? Pleaseeeee show steps! :)

Question

Fred throws a ball using h=-16t^2+10t+8 

How long is the ball in the air??? Pleaseeeee show steps! :)

baldymcgee6 · Answer

is this for a pre-calculus class?

anonymous · Answer

-16t^2+10t+8 = 0
Solve for t :

lgbasallote · Answer

i think they should tell if it goes upward or down...

baldymcgee6 · Answer

@maherman97 http://screencast.com/t/5PNbLyyXIBo If you solve for t, you will find the two intercepts, the furthest positive one will be equal to the total flight time of the ball.

anonymous · Answer

Can I find this with a graphing calculator?

baldymcgee6 · Answer

yeah. you can find this on a graphing calculator very easily.

baldymcgee6 · Answer

If you are using a TI, just throw the function into your y=  operator and hit 2nd trace/calc and find the positive x intercept using the command called "zero". All you have to do is hit a left bound and a right bound (on either side of the axis) then take a guess where you think the intercept is, and it will calculate it for you!