Write as a percent.
A. 19%
B. 190%
C. 1.9%
D. 0.19%
Answer: B
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Use the shell method to find the volume of the solid generated by revolving the shaded region about the indicated axis.About the y-axis 
A. 9? B. 6? C. 12? D. 15?
Evaluate the integral.
A. 
tan3 x + C
B. 2(sec x + tan x)5+ C
C. - 
tan3 x + C
D. 2 tan x + 
tan3 x + C
Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. f
= 
, local minimum
B. 
saddle point
C. f
= 
, local minimum
D. f(6, 6) = 1080, local maximum
Solve the problem.A merchant has coffee worth $40 a pound that she wishes to mix with 30 pounds of coffee worth $90 a pound to get a mixture that can be sold for $70 a pound. How many pounds of the $40 coffee should be used?
A. 10 lb B. 50 lb C. 20 lb D. 25 lb