Question

-16t^2 + 56t + 4 what is t= seconds when height is 28

Answer 1

Assuming the equation is as follows:\[h(t) = -16t^2 + 56t + 4 \]

Answer 2

Then you just need to solve for this: \[h(t)=−16t2+56t+4 = 28\]

Answer 3

\[16t^2 - 56t + 24 = 0\]

Answer 4

Can you solve for t now?

Answer 5

I got t=3.5 is that correct?

Answer 6

Check your calculations again.

Answer 7

Are you using the quadratic formula to solve for t?

Answer 8

no

Answer 9

You should plug the coefficients into the quadratic formula and solve for t.