Question

Can some one help me not really can some one pleas talk to me

Answer 1

its 2/5 or .4 because when u add the exponents you will get a decimal

Answer 2

Time: 2/5 or .4

Explanation:

Without calculus you can solve this by converting the equation into vertex form.

You can convert to vertex form by completing the square.

`y=24+4t-5t^(2) \\y-24=-5t^(2) +4t\\y-25= -5(t^(2) -(4)/(5)) \\y=-5(t-(2)/(5) )^(2) +(124)/(5)`

The vertex form is

`y=-5(t-(2)/(5) )^(2) +(124)/(5)`

From vertex form we know (h,k) is (2/4,124/5) so the height at the max time is 2/5, and the height is 124/5