



 
Hi again MJ, This problem is quite similar to the previous one you sent. In this problem I would draw a diagram. $R$ is the rocket at time $t,$ $B$ is the blastoff point and $C$ is the camera. $h(t)$ is the height of the rocket in miles at time $t.$ The angle between the horizontal and the line of sight of the camera I called $\theta(t).$ You are asked to find the rate of change of $\theta(t)$ at the time when $h(t) = 2$ miles and $h^\prime(t)$ is 400 miles per hour. To do this you need to find a relationship between $h(t)$ and $\theta(t).$ What trig function relates $h(t), \theta(t)$ and the side $BC$? Penny  


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