Solve the problem.Karin biked at 15 mph for a time but got a flat tire. She then walked at 4 mph. She traveled a total of 54 miles. Had she biked the whole time, she would have gone 120 miles. How many hours did she walk?
A. 5 hr
B. 6 hr
C. 7 hr
D. 2 hr
Answer: B
Mathematics
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Use a CAS integration utility to evaluate the triple integral of the given function over the specified solid region.
over the rectangular cube 
A. 
B. 
C. 
D. 
Mathematics
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.(- 2, - 1)
A. increasing B. decreasing C. constant
Mathematics
Solve.David drives for 
hour to get his friend Tom's house. He then drives 
hour to get to the bowling alley. How many hours does David spend driving?
A. 
hour
B. 
hour
C. 
hour
D. 
hour
Mathematics
Solve the problem.Find the sale price when the original price is $86.00 and the discount rate is 11%.
A. $9.46 B. $76.54 C. $85.05 D. $0.95
Mathematics