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find The value of x

The answer to your question is Alex threw the ball from 45.

Step-by-step explanation:

function             h(t) = 8(t - 2)² + 13

time = t = [seconds]

If we need to know the height from which Alex threw the ball, we need to consider that the time was zero, nothing has happened yet.

Evaluate the function when t = 0

                         h(0) = 8(0 - 2)² + 13

Simplification

                         h(0) = 8(-2)² + 13

                         h(0) = 8(4) + 13

                         h(0) = 32 + 13

                        h(0) = 45