A collection of coins has a value of $4.12. There is the same number of nickels and dimes but four fewer pennies than nickels or dimes. How many pennies are in the collection if there are 74 coins?
?
A. 15 pennies
B. 32 pennies
C. 22 pennies
D. 4 pennies
E. 34 pennies
Answer: C
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Use the shell method to find the volume of the solid generated by revolving the shaded region about the indicated line.About the line y = 3x = y + 6
A. 
?
B. 99?
C. 
?
D. 
?
Solve.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?
A. 4 lb B. 2 lb C. 3 lb D. 1 lb
The concentration (in milligrams/cubic centimeter) of a certain drug in a patient's body t hr after injection is given by
?
interval where 
is decreasing.
?
When is the concentration of the drug increasing and when is it decreasing?
?
A. Increasing on 
B. Increasing on 
and decreasing on 
C. Decreasing on 
D. The concentration of the drug is constant.
Find the center, transverse axis, vertices, foci, and asymptotes of the hyperbola.4x2 - 16y2 = 64
A. center at (0, 0)
transverse axis is x-axis
vertices: (-4, 0), (4, 0)
foci: (-2
, 0), (2
, 0)
asymptotes of y = - 
x and y = 
x
B. center at (0, 0)
transverse axis is x-axis
vertices: (-4, 0), (4, 0)
foci: (-2
, 0), (2
, 0)
asymptotes of y = - 
x and y = 
x
C. center at (0, 0)
transverse axis is x-axis
vertices: (-2, 0), (2, 0)
foci: (-2
, 0), (2
, 0)
asymptotes of y = - 
x and y = 
x
D. center at (0, 0)
transverse axis is x-axis
vertices: (0, -4), (0, 4)
foci: (0, -2
), (0, 2
)
asymptotes of y = - 
x and y = 
x