Write the expression in the standard form a + bi.If z = 8 + 9i and w = -3 + i, evaluate 
.
A. -11 - 8i
B. 11 - 8i
C. 5 + 10i
D. 11 + 8i
Answer: B
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Determine whether the matrices are inverses. 
, 
A. No B. Yes
Use the circle graph to solve the problem.A survey of the 7872 vehicles on the campus of State University yielded the following circle graph. 
Find the number of hatchbacks. Round your result to the nearest whole number.
A. 2362 B. 35 C. 2755 D. 5117
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.Last year the profit for a company was $630,000. This year's profit decreased by 2.2%. Find this year's profit.
A. $138,600.00 B. $616,140.00 C. $491,400.00 D. $13,860.00