Question

H(x)=-3(x-3)^2+108 how many seconds after takeoff will the hovercaff be its highest point

Answer 1

-3x^2 + 189

Explanation:

If you know what PEMDAS is, then you do the parenthesis first, and you get -3x^2 + 9^2 + 189. Then you take 9^2 and solve that part, and you get 81. Then, since there are two numbers with no exponents or variables, you add 81+108, getting 189. This leaves you with your answer, which is -3x^2+189.

Hope this helps!

Answer 2

at 3 seconds

Explanation:

the vertex will provide the maximum or minimum of the curve and can be found by finding the values of 'h' and 'k'

in this problem, 'h' is 3 and 'k' is 108

so at 3 seconds, the maximum height is reached, which is 108 feet