Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 20 watches
B. 31 watches
C. 63 watches
D. 39 watches
Answer: D
Mathematics
You might also like to view...
Plot the point whose polar coordinates are given.
A. 
B. 
C. 
D. 
Mathematics
Solve the rational equation.
= 1 - 
A. {18} B. {0} C. {-9, 1} D. {1}
Mathematics
Solve the problem.The lifetimes of light bulbs of a particular type are normally distributed with a mean of 360 hours and a standard deviation of 8 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
A. 95.44% B. 68.26% C. 84.13% D. 31.74%
Mathematics
Identify the name of the angles labeled in the figure.
A. Complementary angles B. Alternate interior angles C. Corresponding angles D. Alternate exterior angles
Mathematics