Find the product. Write the product in rectangular form, using exact values.[8(cos 210° + i sin 210°)] [6(cos 330° + i sin 330°)]
A. 12
+ 12i
B. -12 + 12
i
C. 24i
D. -48
Answer: D
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Solve the problem.Use the table to find the APR to the nearest whole percent. Assume that all interest rates are annual rates.
Amanda has agreed to pay off a $4100 loan by making 12 monthly payments. The total finance charge on her loan is $328.
A. 15% B. 12% C. 14% D. 13%
Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a4 when a1 = 6, r = 4.
A. 64 B. 72 C. 1536 D. 384
Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by C(x) = 
, what is the unit cost for 20 units?
A. $25.00 B. $75.00 C. $1.50 D. $21.43
Solve the exponential equation and approximate the result, correct to three decimal places.4x = 21
A. 2.196 B. 5.250 C. 0.455 D. 1.658