Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 39 watches
B. 44 watches
C. 20 watches
D. 88 watches
Answer: A
Mathematics
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Find the derivative of the function.y = 6 sec2x
A. 12 tan x sec2x B. 12 sec1x C. 12 tan2x sec2 x D. 12 tan2x sec1x
Mathematics
Solve the problem.The accompanying figure shows the graph of y = -x2 shifted to a new position. Write the equation for the new graph.
A. y = -x2 + 4 B. y = -(x + 4)2 C. y = -x2 - 4 D. y = -(x - 4)2
Mathematics
Multiply.× 
A. 708.883 B. 708.993 C. 708.983 D. 708.994
Mathematics
Use the numeric integration feature on your calculator to find the integral.
A. 23.50167 B. None of the above is correct. C. 0.50167 D. 2.350167
Mathematics