Determine the degree of the polynomial.-a + 9a3 - 4a7 + 3a2
A. 4
B. 12
C. 13
D. 7
Answer: D
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Find the areas bounded by the indicated curves, using vertical or horizontal elements.y = x3, y = 49x
A. 
B. 1127
C. 
D. 
Solve the problem.A circular swimming pool, 20 feet in diameter, is enclosed by a circular deck that is 6 feet wide. What is the area of the deck? Use ? = 3.1416.
A. 1206.4 ft2 B. 772.8 ft2 C. 490.1 ft2 D. 314.2 ft2
Determine the size of the matrix.
A. 2 × 3 B. 9 C. 6 × 6 D. 3 × 3
Solve the problem.A consumer notes the sinusoidal nature of her monthly power bills. In winter when she uses electricity to heat her home and in summer when she cools her home, the bills are high. In spring and fall, significantly less electricity is used and the bills are much smaller. The following function models this behavior. C = 60 + 40 cos 
Here C is the cost of power in dollars for the month t, 1 ? t ? 12, with t = 1 corresponding to January. For what values of t, 1 ? t ? 12, is the cost exactly $80?
Fill in the blank(s) with the appropriate word(s).