3/29/09 9:48 PM
Blackboard Learning System
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Title:
Problem Set 4.7
Started:
March 25, 2009 10:06 PM
Submitted:
March 25, 2009 11:25 PM
Time spent:
01:19:30
Total score:
9/10 = 90%
Total score adjusted by 0.0
Maximum possible score: 10
Done
1.
Provide an appropriate response.
A company is manufacturing a new digital watch and can sell all it manufactures. The cost (in
dollars) is given by
where the production output in one day is x watches. If
production is increasing at
per day when production is 375 watches per day, find the
rate of increase in cost.
Student Response
Feedback
A. $75 per day
B. $175 per day
C. $5 per day
D. $10 per day
Score:
1/1
2.
Provide an appropriate response.
Given the revenue and cost functions R = 26x  0.3x
2
and C = 3x + 10, where x is the daily
production, find the rate of change of profit with respect to time when 20 units are produced
and the rate of change of production is 7units per day per day.
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 Spring '09
 hamidy
 Calculus, Supply And Demand, $16, $5, $10, $60, A. B. C. E

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