Find the exact value of the expression. Do not use a calculator.- 
A. -1
B. 1
C. 0
D. undefined
Answer: A
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Match the inequality with its correct representation.
A. x ? -2 B. x > -2 C. x ? -2 D. x < -2
Solve the problem.Assume the total revenue from the sale of x items is given by 
while the total cost to produce x items is 
Find the approximate number of items that should be manufactured so that profit, 
is maximum.
A. 228 items B. 178 items C. 56 items D. 128 items
Find all solutions of the equation in the interval [0, 2?).(8 cot x + 8
)(5 cot x - 5) = 0
A. 
B. 
C. 
D. 
Solve the problem.An electrician has to choose different types of wire for different applications. The size of the diameter of the wire is inversely related to the gauge of the wire. The chart below shows some different gauges of wire and their approximate diameters. Use the chart to answer the question. 
What is the gauge of the wire with a diameter of 
inch?
A. 16 gauge B. 12 gauge C. 10 gauge D. 14 gauge