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Question

explain how to find the time it takes for a rocket following the path of the parametric equations, x = 3t 2 and y = -9t + 18, to hit the ground
7 years ago

Answers

Steve
if y is the height, then all you need is

y=0
-9t+18 = 0
t = 2

so, it takes 2 seconds to hit the ground.
7 years ago

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