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 60 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 312 seconds.
A. 0.0107
B. 0.5107
C. 0.9893
D. 0.4893
Answer: A
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Let U = {all soda pops}, A = {all diet soda pops}, B = {all cola soda pops}, 
and 
Describe the set in words.A' ? C
A. All non-diet soda pops in cans B. All non-diet soda pops and all soda pops in cans C. All diet soda pops and all soda pops in cans D. All diet soda pops in cans
Find the volume generated by revolving the region bounded by the given curves about the y-axis. Use the method of disks.y2 = x, y = 5, x = 0
A. 
?
B. 
?
C. 
?
D. 625?
Find the extreme values of the function and where they occur.y = 
A. The minimum value is 0 at x = 0. B. The maximum value is 0 at x = 0. C. The minimum value is - 2 at x = -1. The maximum value is 2at x = 1. D. The minimum value is 0 at x = 1. The maximum value is 0 at x = -1.
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, 6) and (5, 0)
vertices at (0, 36), (25, 0)
B. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -6), (0, 6)
C. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-6, 0), (6, 0)
D. center at (0, 0)
foci at (0, -6) and (0, 6)
vertices at (0, -36), (0, 36)