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OpenStudy (anonymous):
A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 2.1 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building? can you explain this question to me thanks!!
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OpenStudy (anonymous):
|dw:1350822542794:dw|
OpenStudy (anonymous):
you want to find dy/dt
OpenStudy (anonymous):
y= 24/x differentiate with respect to time and plug in the value of x and dx/dt
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