Evaluate.-23
A. 2
B. -8
C. 8
D. -4
Answer: B
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Find the expected value.Suppose that 1,000 tickets are sold for a raffle that has the following prizes: one $300 prize, two $100 prizes, and one hundred $1 prizes. What is expected value of a ticket?
A. $300 B. $0.60 C. $1 D. $100
Find the foci of the ellipse.64x2 + y2 - 1152x + 5120 = 0
A. (8, 4
), (8, -4
)
B. (9 + 3
, 0), (9 -3
, 0)
C. (9, 8), (9, -8)
D. (9, 3
), (9, -3
)
Solve the problem.A motorcycle and a car leave an intersection at the same time. The motorcycle heads north at an average speed of 20 miles per hour, while the car heads east at an average speed of 48 miles per hour. Find an expression for their distance apart in miles at the end of t hours.
A. 2t
miles
B. t
miles
C. 52
miles
D. 52t miles
Write the expression in the standard form a + bi.If z = 6 - 2i, evaluate z + 
.
A. 12 + 4i B. -4i C. 12 D. 12 - 4i