Multiply.(-5x - 3)2
A. 25x2 + 9
B. -5x2 + 30x + 9
C. 25x2 + 30x + 9
D. -5x2 + 9
Answer: C
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.r(t) = (cos 2t)i + (4 sin t)jFind the acceleration vector.
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Find the rate of change of revenue per unit when the cost per unit is changing by 
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A. -1° B. -60° C. -60?° D. 1°