Solve the problem.BJ can overhaul a boat's diesel inboard engine in 15 hours. His apprentice takes 30 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A. 45 hr
B. 10 hr
C. 4 hr
D. 6 hr
Answer: B
Mathematics
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Solve the problem.Using the numerals 0 through 9, how many 6-digit serial numbers can be made if the first digit must be 0 or 1 and numerals may be repeated?
A. 200,000 B. 100 C. 1,000,000 D. 118,098
Mathematics
Solve the initial value problem for x as a function of t.(t2 + 4t)
= 4x + 12, x(1) = 1
A. x = 
- 3
B. x = 20t + ln 
- 3
C. x = 
- 3
D. x = 20 ln
- 3
Mathematics
Predict the number of tick marks on the positive x - axis and the positive y-axis.[-66, 66, 6] by [-96, 78, 6]
A. 29; 22 B. 22; 29 C. 11; 13 D. 13; 11
Mathematics
Simplify the radical. Assume that all variables represent positive numbers.
A. 100 B. 32 C. -10 D. ±10
Mathematics