Use the four-step method in problem solving to solve the problem.CD's were purchased at $65 per dozen and sold at $40 for four CD's. Find the profit on 9 dozen CD's.
A. $25
B. $55
C. $495
D. $225
Answer: C
Mathematics
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = 3, x = 0
A. 
?
B. 9?
C. 
?
D. 18?
Mathematics
Find the focus and directrix of the parabola.- 
x2 = y
A. (0, 5); y = -5 B. (-10, 0); x = 5 C. (0, -5); y = -5 D. (0, -5); y = 5
Mathematics
Provide an appropriate response.Find the area of a sector, A, if ? = 20° and r = 3 in.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.Twin City Freezer accepts a note with face value of $5160 on June 4. The note is for 240 days at 7% interest based on ordinary interest. The note is discounted on July 24 at 8% using the banker's rule. Find the proceeds.
A. $5172.77 B. $5201.27 C. $5124.72 D. $5171.57
Mathematics