Write the expression in the standard form a + bi.If z = 4 - 6i and w = 2 + 2i, evaluate 
.
A. 2 + 8i
B. 6 - 4i
C. 6 + 4i
D. -6 + 4i
Answer: B
Mathematics
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Evaluate the improper integral or state that it is divergent.
A. 0 B. -12 C. Divergent D. 12
Mathematics
Give the center and radius of the circle. Then sketch its graph.(x + 1)2 + (y - 2)2 = 9
A. center (1, 2), r = 3
B. center (- 1, 2), r = 3
C. center (1, - 2), r = 3
D. center (- 1, - 2), r = 3
Mathematics
Solve the problem.The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by 
where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
A. $534 B. $828 C. $338 D. $632
Mathematics
Solve the equation on the interval 0 ? ? < 2?.2 cos ? + 3 = 2
A. 
B. 
C. 
D. 
Mathematics