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OpenStudy (anonymous):
A rocket is launched straight up. At t seconds after being launched, its altitude is given by h = 10t^2 metres. You are on the ground 400 metres from the launch site, watching the rocket. The line of sight from you to the rocket makes an angle D radians with the horizontal. Five seconds after launch, by how many radians per second is D changing?
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OpenStudy (anonymous):
|dw:1397364680165:dw|
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