Provide an appropriate response.State the range of the inverse cotangent function.
A. [-1, 1]
B. 
C. (-?, -1] ? [1, ?)
D. (0, ?)
Answer: D
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Solve the problem.The surface area of a right circular cylinder is given by 2?rh + 2?r2 where h is its height and r is the radius of the circular base. The surface area of a right circular cone having the same base radius, r, is given by ?rs + ?r2 where s is its slant height. Write the ratio of the surface area of the cylinder to the surface area of the cone in simplest form.
A. 
B. 
C. 
D. 
Divide and simplify.
A. -15x11 - 8x4 B. -5x15 C. 3x8 + 40x7 D. 3x8 - 8x4
Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of chlorine dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship. What does the ordered pair (9, 28.4) mean in the context of this situation?
A. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 15 minutes elapsed. B. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 9 seconds elapsed. C. (9, 28.4) indicates that 9 ppm of chlorine was dissolved after 28.4 minutes elapsed. D. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 9 minutes elapsed.
Find the weighted mean of the numbers in the table. Round to the nearest tenth.A telephone company kept track of the calls for the correct time during a 
period for two weeks. The results are shown in the table.
A. 59.6 calls B. 62.0 calls C. 61.6 calls D. 61.8 calls