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is given by y (t) = −16t2 − 32t + 128.
(a) How fast is the ball traveling after .5 seconds?
(b) How fast is the ball traveling when it hits the ground? 8. (15 points) A company manufactures and sells widgets. The monthly cost (in thousands of dollars) of
manufacturing x (thousand) widgets is given by C (x), and the revenue is given by R(x).
√
C (x) = 50 x + 10
R(x) = 40x − x2
The company currently produces 10 thousand widgets a month.
(a) Find the marginal revenue function. If production increases, will revenue increase or decrease?
(b) What is the current proﬁt?
(c) What is the current marginal proﬁt? Should the company increase or decrease production?...
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This document was uploaded on 03/14/2014 for the course MATH 6 at Long Island U..
 Spring '13
 Dr. Corbett Redden
 Math, Calculus

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