Solve the problem.Bob 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. 12 hr
B. 20 hr
C. 90 hr
D. 8 hr
Answer: B
Mathematics
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Perform the indicated operations and, if possible, simplify. Recall that multiplications and divisions are performed in order from left to right.
? 
÷ 
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Solve for W. P = 2L + 2W
A. W = 
B. W = P - L
C. W = 
D. W = d - 2L
Mathematics
Find the vertices and foci of the hyperbola.
- 
= 1
A. Vertices: (0, ± 8); Foci: (0, ± 2) B. Vertices: (0, ± 2); Foci: (0, ±8) C. Vertices: (± 8, 0); Foci: (± 2, 0) D. Vertices: (± 2, 0); Foci: (± 8, 0)
Mathematics
Use radical notation to rewrite the expression. Simplify, if possible.1441/2
A. 6
B. 72
C. 12
D. 
Mathematics