Solve the problem and answer the question.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. 4 hr
B. 45 hr
C. 10 hr
D. 6 hr
Answer: C
Mathematics
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Write the whole number in standard form.Eight thousand, one hundred sixty-seven
A. 810,067 B. 800,167 C. 8167 D. 81,067
Mathematics
Graph the parametric equations.x = 4 tan t, y = 3 sec t, for t in [0, 2?]
A. 
B. 
C. 
D. 
Mathematics
Simplify the complex rational expression.
A. - 
B. - 
C. - 
D. - 
Mathematics
Provide an appropriate response.Evaluate dy and ?y for y = f(x) = 20 + 15x2 - x3, x = 2, and dx = ?x = 0.3.
A. dy = 14.4; ?y = 14.4 B. dy = 15.183; ?y = 15.183 C. dy = 14.4; ?y = 15.183 D. dy = 15.183; ?y = 14.4
Mathematics