Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75
B. $2.00
C. -$3.00
D. $3.00
Answer: A
Mathematics
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Find only the rational zeros.f(x) = x6 + 1
A. 1, -1, 
, - 
B. 1, -1, 
, - 
, 
, - 
C. 1, -1
D. No rational zeros
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Find the sum of the sequence.
A. 272 B. 53 C. 400 D. 384
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Find an for the given geometric sequence.a2 = -10, r = -2
A. an = 5(-2)n - 1 B. an = -10(-2)n - 1 C. an = 5(-2n) D. an = 5(-2)n
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Solve the problem.In the year 2000, the population of Salem was 6,400 and the population of Trevor was 1,600. The projected trends in the populations of these two cities are indicated on the graph below.
Write as an ordered pair (year, population) the point at which Salem and Trevor will have the same population?
A. (4000, 2030) B. (2020, 8000) C. (2000, 8000) D. (2020, 4000)
Mathematics