Math, asked by luhbxddie, 12 hours ago

Please help! I have PreACT's in the morning This is my review!
The equation h(t)=-4.9t^2 + 45t + 15 shows the height of a person launched from a cannon over time. What is the initial height? What is the initial velocity?

Answers

Answered by Anonymous
3

5.0

When the ball hits the ground, h=0

⇒−4.9t

2

+25t=0

⇒4.9t

2

=25t

⇒t=0 or 4.9t=25=>t is approximately equal to 5

Thus, after 5 seconds, the ball hits the ground.

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