Solve the problem.Suppose that the dollar cost of producing x radios is 
Find the marginal cost when 50 radios are produced.
A. $60
B. $20
C. $2,300
D. -$2,300
Answer: B
Mathematics
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Solve the problem.Find the work done in winding up a 150-ft cable that weighs 5.00 lb/ft.
A. 1880 ft ? lb B. 169,000 ft ? lb C. 11,300 ft ? lb D. 56,300 ft ? lb
Mathematics
Find Dxy.y = -sinh-1 (3x2 + 4)
A. 
B. 
C. 
D. 
Mathematics
Find the function value. If the result is irrational, round your answer to the nearest thousandth.Let f(x) = 
x. Find f(-2).
A. 
B. -12
C. 36
D. - 
Mathematics
Evaluate.Evaluate x + y + 13, if x is 25 and y is 37.
A. 62 B. 76 C. 74 D. 75
Mathematics