Solve the problem.BJ can overhaul a boat's diesel inboard engine in 20 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. 12 hr
B. 80 hr
C. 6 hr
D. 15 hr
Answer: D
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Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. f(-8, 3) = 227, local maximum B. f(-8, -3) = 191, saddle point C. f(8, -3) = -65, local minimum D. f(8, 3) = -29, saddle point
Find the limit of the sequence if it converges; otherwise indicate divergence.an = 
A. 1 B. 7 C. 0 D. Diverges
Solve the problem.A company predicts that sales will increase rapidly after a new product is released, with the number of units sold weekly modeled by N = 3000(0.2)0.7t, where t represents the number of weeks after the product is released. Use graphical or numerical methods to find the first week in which 2250 units were sold.
A. 3rd week B. 5th week C. 6th week D. 7th week
The graph represents the 24-hour day of a small-business owner.
What activity takes the most time? How many hours?
A. Work, 10 hours B. Sleep, 8 hours C. Work, 8 hours D. Work, 12 hours