key 6 3. j

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Math 1100
21 October, 2013
Homework 18
Name:
1. (10 points) If 3a— 1
,
find
d
j
when c
key
3 and
dx
—6
3.
6
dy
,
1.
cit
2. (10 points) The cost for a company to produce r units of a particular commodity is
given by C(x) = 300 -I- 6x -I— 2• Find the rate of change of cost if 200 units are
produced and the wumber of units is increasing at a rate of 6 per month.
d&
.
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