Solve the problem.If n(A) = 25, n(A ? B) = 73, and n(A ? B) = 21, find n(B).
A. 48
B. 69
C. 70
D. 68
Answer: B
Mathematics
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Solve the problem.The following table shows the rate of water flow (in gal/min) from a stream into a pond during a 30-minute period after a thunderstorm. Use the Trapezoidal Rule to estimate the total amount of water flowing into the pond during this period. Round your answer to the nearest gallon.
A. 7717 gal B. 8475 gal C. 8483 gal D. 9600 gal
Mathematics
A horse trots in a perfect circle around its trainer at the end of a 20-foot-long rope. How far does the horse travel as it circles the trainer once?
A. 400 ft B. 63 ft C. 1,657 ft D. 126 ft E. 1,257 ft
Mathematics
If y varies inversely as x, write a general formula to describe the variation.y = 40 when x = 
A. y = 200x
B. y = 
C. y = 
D. y = 
Mathematics
Graph.f(x) = 
x - 3
A. 
B. 
C. 
D. 
Mathematics