The (r + 1)st term of the expression (a + b)n, 0 ? r ? n, is given by 
an - rbr. Find the specified term.The 5th term of (5x + 3)5.
A. 2025x
B. 675x
C. 3375x2
D. 1215
Answer: A
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Find n(A) for the set.A = {700, 701, 702, ..., 7000}
A. n(A) = 4 B. n(A) = 7000 C. n(A) = 6301 D. n(A) = 6300
Solve the problem.A promotional deal for long distance phone service charges a $15 basic fee plus $0.05 per minute for all calls. If Joe's phone bill was $47 under this promotional deal, how many minutes of phone calls did he make? Round to the nearest integer, if necessary.
A. 2 min B. 640 min C. 6 min D. 1240 min
Solve the problem.On the September 1 billing date, Martin had a balance due of $991.93 on his credit card. The transactions during the following month were: 
The interest rate on the card is 1.4% per month. Using the average daily balance method, find the finance charge on October 1 (September has 30 days).
A. $22.03 B. $18.36 C. $18.52 D. $18.12
Find the rectangular coordinates of the point with the given polar coordinates.
A. (-4, -7)
B. (-2, -2
)
C. (-2, -3)
D. (-0.5, -
/2)