Determine whether the lines through each pair of points are parallel, perpendicular, or neither.(8, -4) and (28, -16); (-16, -10) and (-10, 0)
A. neither
B. parallel
C. perpendicular
Answer: C
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Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers.
A. Systematic B. Stratified C. Convenience D. Simple random
Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function increases most rapidly.
A. 
B. 
C. 
D. 
Find the volume of the shaded solid. Round your answer to 2 decimal places if necessary. Use ? = 3.14 when necessary.
A. 125,600 ft3 B. 510,250 ft3 C. 31,400 ft3 D. 628 ft3
Use the two steps for solving a linear programming problem to solve the problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 28 units of vitamin A, at least 7 units of vitamin B, and at least 20 units of vitamin C. The red vitamin pills cost 
each and contain 6 units of A, 1 unit of B, and 2 units of C. The blue vitamin pills cost 
each and contain 4 units of A, 1 unit of B, and 5 units of C. How many pills should the patient take each day to minimize costs?
A. 5 red and 2 blue B. 7 red and 0 blue C. 2 red and 5 blue D. 6 red and 1 blue