Question

Can anyone help with this problem. I've been stuck.

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Answer 1

\[-16t^2+32t+80>80\] or \[-16t^2+32t>0\]

Answer 2

you know how to solve that ?

Answer 3

No sorry @satellite73

Answer 4

Divide by -16.
Remember to flip inequality because we divided equation by neg number
\[t^2 - 2t < 0\]
Factor out a t
\[t(t-2) < 0\]
Now graph parabola to help see the inequality solution
"x-intercepts" at t = 0, t= 2

Solution is between 0 and 2, the part of graph less than zero