Find the probability that a normal variable takes values more than 
standard deviations away from its mean. Please, round the answer to four decimal places.
?
A. 0.9867
B. ?0.8026
C. ?0.8016
D. ?0.4013
E. ?0.8036
Answer: B
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Determine whether the events A and B are independent.Two cards are selected at random from a standard deck of 52 cards without replacement. Event A: An ace is selected on the first drawEven B: An ace is selected on the second draw
A. No B. Yes
Decide whether the relation defines a function.y = 
A. Not a function B. Function
Find the amount of each payment needed to accumulate the indicated amount in a sinking fund. Round to the nearest cent.
$6100, money earns 6% compounded semiannually, 6 years
A. $943.06 B. $361.61 C. $429.81 D. $874.50
Solve.Gary has to choose between two calling plans for his local phone service. Plan A charges a monthly fee of $30 regardless of how many local calls are placed. Plan B charges $15 per month plus $0.50 for each local call placed. Express each plan's price structure, y, in terms of number of calls placed, x.
A. Plan A: y = 30 Plan B: y = 15x + 0.50 B. Plan A: y = 30 Plan B: y = 0.50x + 15 C. Plan A: y = 30x Plan B: y = 0.50x + 15 D. Plan A: y = 15 Plan B: y = 0.50x + 30