Solve the problem.BJ can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A. 90 hr
B. 12 hr
C. 20 hr
D. 8 hr
Answer: C
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The stack plot below shows the value of each of Danny's investments. The stack plot contains three regions. The uppermost unshaded region represents the value of Danny's investment in individual stocks. The center shaded region represents the value of Danny's investment in mutual funds and the bottom region in black represents the value of Danny's investment in a CD. The thickness of a region at a particular time tells you its value at that time. 
Use the graph to answer the question.In year 0, approximately what percentage of Danny's total investment was in the CD?
A. 20% B. 30% C. 15% D. 25%
Find the average of the numbers.12, 5, 8, 9, 6
A. 8 B. 10 C. 9 D. 41
Decide whether or not the function is continuous in the indicated x-interval.-3 to 0
A. Continuous B. Not continuous
Find decimal notation.
A. 0.36 B. 0.5 C. 0.44 D. 0.24