Question 1139478: Applications of Quadratic Equations (Modeling):
1.If you throw a ball straight up from a rooftop 160 feet high with an initial speed of 48 feet per second, then the formula h=-16t^2+48t+160
describes the ball's height h feet above the ground, t seconds after you released it. The ball misses the rooftop and eventually strikes the ground.
a) What is the height of the ball one second after you release it?
Solution:Find
the value of h in the formula h=-16t^2+48t+160 when t=1.
h=_____ feet
b) How long will it take the ball th hit the ground?
Solution:Find the value of t in the formula h=-16t^2+48t+160 when h=0
It will take _______ seconds for the ball th hit the ground.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 1.If you throw a ball straight up from a rooftop 160 feet high with an initial speed of 48 feet per second, then the formula h=-16t^2+48t+160
describes the ball's height h feet above the ground, t seconds after you released it. The ball misses the rooftop and eventually strikes the ground.
a) What is the height of the ball one second after you release it?
Solution:Find
the value of h in the formula h=-16t^2+48t+160 when t=1.
Do NOT enter h=_____ feet. How would we use that?
h(t) = -16t^2+48t+160
It's h(1)
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b) How long will it take the ball to hit the ground?
Solution:Find the value of t in the formula h=-16t^2+48t+160 when h=0
Yea, do that.
-16t^2 + 48t + 160 = 0
Solve for t.
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