Solve the problem. Round to the nearest hundredth, if necessary.The average middle-distance runner at a local high school runs the mile in 5.8 minutes, with a standard deviation of 0.2 minute. Find the percentage of a runners that will run the mile in less than 5.5 minutes?
A. 93.32%
B. 6.68%
C. 30.85%
D. 69.15%
Answer: B
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Write an equivalent double integral with the order of integration reversed.
A. 
B. 
C. 
D. 
Solve the problem.The side of an equilateral triangle is 3 inches shorter than the side of a square. The perimeter of the square is 28 inches more than the perimeter of the triangle. Find the length of a side of the square.
A. 20 inches B. 18 inches C. 16 inches D. 19 inches
Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. 6 ln 
+ 
ln 
+ 
tan-1 
+ C
B. 6 ln 
- 
ln 
- tan-1 x + C
C. 6 ln 
+ 
ln 
+ sin-1 
+ C
D. ln 
+ 
ln 
+ tan-1 
+ C
Solve.In the study of alternating electric current, capacitive voltage is given by 
, where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 
Arccos (- 
)
B. t = 2?f cos (- 
)
C. t = 2?f Arccos (- 
)
D. t = 
Arccos (
)