Solve the problem.Suppose c(x) = x3 - 16x2 + 20,000x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.
A. 9 items
B. 8 items
C. 10 items
D. 7 items
Answer: B
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Evaluate the integral.
A. 
B. 9
C. 27
D. 
You pay $10 to register at a web site. After registering you pay 59 cents for each song you download. Then the total amount you pay for music at this site is a linear function of the number of songs you download.
Answer the following statement true (T) or false (F)
Use a half-angle identity to find an exact value for the following, given the information about x. Find cos 
, given that sin x = 
and 360° < x < 450°.
A. 
B. 
C. - 
D. - 
The graph shows the percentage of households in a certain city watching television during a 24-hr period on a weekday (t=0 corresponds to 6 a.m.). By computing the slope of the respective tangent line, estimate the rate of change of the percentage of households watching television at a-12 p.m. Note that dy=0.03
