Solve the problem.A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school will take longer than 335 seconds to run the mile.
A. 0.9893
B. 0.4893
C. 0.5107
D. 0.0107
Answer: A
Mathematics
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Rationalize the denominator. Assume that all variables represent positive real numbers and that the denominator is not zero.
A. 
B. 
C. 
- 
D. 
Mathematics
Find the value of the determinant.
A. -61 B. -31 C. 191 D. 31
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Graph the equation by plotting ordered pairs of numbers.y = - 
(x - 1)3
A. 
B. 
C. 
D. 
Mathematics
Evaluate.
A. 21 B. 7 C. 1 D. 0!
Mathematics