Perform the indicated operation and write the answer in the form 
where a and b are real numbers.(8 + 4i)(2 + 9i)
A. -20 - 80i
B. 52 - 64i
C. 36i2 + 80i + 16
D. -20 + 80i
Answer: D
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Find the radius or measure of the central angle as indicated. Round your answer to two decimal places when necessary.Find the radian measure of a central angle in a circle of radius 19 ft of a sector of area 29 ft2.
A. 0.16 radians B. 10,469 radians C. 5234.5 radians D. 0.08 radians
Solve.The perimeter of a rectangle is 62 feet. Describe the possible length of a side if the area of the rectangle is not to exceed 198 square feet.
A. The length of the shortest side cannot exceed 22 feet. B. The length of the shortest side must be at least 9 feet. C. The length of the shortest side cannot exceed 9 feet. D. The length of the shortest side must be at least 22 feet.
Solve the problem.Find the least amount that could be deposited in a bank account today at 12% compounded quarterly to allow $650 withdrawals at the end of each quarter for 10 years.
A. $14,825.34 B. $15,218.06 C. $28,308.73 D. $15,024.60
Multiply.(5m3z4)(2m2z2)
A. 10mz6 B. 10mz5 C. 10m5z D. 10m5z6