Simplify. Write your answers in the form of a+bi, where a and b are real numbers.(6 + 4i)(8 + 4i)
A. 32 - 56i
B. 16i2 + 56i + 48
C. 64 + 8i
D. 32 + 56i
Answer: D
Mathematics
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Perform the indicated operation.
A. 15.4 B. 1.54 C. 5.4 D. 0.54
Mathematics
Solve the problem.The revenue for a small company is given by the quadratic function 
where t is the number of years since 1998 and r(t) is in thousands of dollars. If this trend continues, find the year after 1998 in which the company's revenue will be $2185 thousand. Round to the nearest whole year.
A. 2009 B. 2011 C. 2010 D. 2020
Mathematics
Find the cube root of the number. Approximate the answer to the nearest hundredth whenever appropriate.b27
A. b10 B. b8 C. b9 D. b24
Mathematics
Determine whether the matrix is symmetric.
A. No B. Yes
Mathematics