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. 82 watches
B. 41 watches
C. 40 watches
D. 46 watches
Answer: D
Mathematics
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Find the flux of the curl of field F through the shell S.F = 4yi + 2xj + cos(z)k ; S: r(r,?) = 4 sin ? cos ?i + 4 sin ? sin ?j + 4 cos ?k, 0 ? ? ? 2? and 0 ? ? ? 
A. -32 B. 64? C. -32? D. -64?
Mathematics
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What will be an ideal response?
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Solve the equation on the interval 0 ? ? < 2?.
cos(2?) = 1
A. No solution
B. 
C. 
D. 
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Find the exact value of the expression. Do not use a calculator.1 + cot2 30° - sec2 45°
A. 1 B. 2 C. 3 D. 0
Mathematics