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. 12 hr
B. 8 hr
C. 90 hr
D. 20 hr
Answer: D
Mathematics
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Evaluate the expression by first changing the form. Verify the answer by use of a calculator. sin 265° cos 25° - cos 265° sin 25°
A. 
B. - 
C. - 
D. 
Mathematics
Find the measure of the supplement of the angle.Find the supplement of 30°.
A. 150° B. 330° C. 60° D. 240°
Mathematics
Find an approximation of the area of the region R under the graph of the function f on the interval [a, b]. Use n subintervals and choose the representative points as indicated.
?
; 
; 
; left end points
?
A. 6.985 sq units;
B. 6.495 sq units;
C. 6.1 sq units;
D. 6.625 sq units;
Mathematics
Solve the application problem.The product of two positive consecutive odd integers is 99. Find the integers.
A. -11, 9 B. -11, 11 C. 9, 11 D. -11, -9
Mathematics