Assume that x and y are differentiable functions of t. A point is moving along the graph of the equation 
At what rate is y changing when 
and is changing at a rate of 4 units/sec?
A) 96 units/sec
B) 92 units/sec
C) 87 units/sec
D) 60 units/sec
E) 44 units/sec
Correct Answer:
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