A ball is thrown from an initial height of 2 feet with an initial upward velocity of 37ft/s. The balls height h (in feet) after t seconds is given by the following.
H=2+37t-16t^2
Find all values of t for which the balls height is 22 feet.
Round your answer to the nearest hundredth

Question

A ball is thrown from an initial height of 2 feet with an initial upward velocity of 37ft/s. The balls height h (in feet) after t seconds is given by the following. 
H=2+37t-16t^2
Find all values of t for which the balls height is 22 feet. 
Round your answer to the nearest hundredth

anonymous · Answer

Make h=22 then solve for t

anonymous · Answer

So I would do 22=2+37t-16t^2. Then subtract 2 from both sides?

anonymous · Answer

I don't understand because I'll still have a t and a t^2 value

anonymous · Answer

Subtract 22 from both sides what do you have?

anonymous · Answer

0=-20+37t-16t^2?

anonymous · Answer

Now solve for t using the quadratic formula?

anonymous · Answer

So solve -16t^2+37t+29 in quadratic formula

anonymous · Answer

Yes and that should be +20 not +29

anonymous · Answer

For every value where t is positive will be your answers.

anonymous · Answer

So I got -37+or- square root of 2649/-64...I don't understand where t is positive. I'm so sorry I'm so confused

anonymous · Answer

I got 2 neg values...should I get that?