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If a rock falls from a height of 20 meters on Earth, the height H, in meters, after x seconds is approximately H(x) = 20 - 4.9x^2.
A. What is the height of the rock when x = 1.3 seconds?
We are looking for H(1.3). Yes?
B. When is the height of the rock 5 meters?
We are looking for x when H(x) = 5 meters.
Yes?
C. When does the rock hit the ground?
We are looking for x when H(x) = 0.
Yes?
.
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A. yes
B. yes
C. yes
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A. yes
B. yes
C. yes
Good. Thanks.
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