Solve.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. 36 watches
B. 40 watches
C. 72 watches
D. 35 watches
Answer: D
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True or false?In Euclidean geometry, if two triangles have different side lengths, they cannot have identical angles.
A. True B. False
Determine the number of triangles ABC possible with the given parts.a = 15, b = 28, B = 94°
A. 0 B. 3 C. 2 D. 1
Solve the problem. Round your answer to the nearest tenth.The roof of a building is in the shape of the top half of the hyperbola y2 - x2 = 75, where x and y are in meters. Refer to the figure and determine the height h of the outside walls. 
? a = 9.0 m b = 9.0 m
A. 6.0 m B. 12.5 m C. 156.0 m D. 66.0 m
Solve the problem.In a survey about the number of siblings of college students, the following probability table was constructed: 
What is the probability that a student 3 or more siblings?
A. 0.77 B. 0.23 C. 0.13 D. 0.1