Find the foci of the ellipse.
+ 
= 1
A. (0, -3), (0, 3)
B. (-3, 0), (3, 0)
C. (-4, 0), (4, 0)
D. (0, -4), (0, 4)
Answer: A
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Match the surface show below to the graph of its level curves.
A. 
B. 
C. 
D. 
Write the first five terms of the arithmetic sequence with the given values.a1 = 15, d = -5
A. 20, 15, 10, 5, 0 B. 10, 5, 0, -5, -10 C. 15, 10, 4, 0, -5 D. 15, 10, 5, 0, -5
Evaluate the sum.
A. 133 B. 150 C. 126 D. 154
Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of hydrogen chloride 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.
Plot the information on the following coordinate plane. What general trend do the data reflect?
A. With increasing elapsed time, the
amount of dissolved hydrogen chloride increases.
B. With increasing elapsed time, the
amount of dissolved hydrogen chloride decreases.
C. With increasing elapsed time, the
amount of dissolved hydrogen chloride increases.
D. With increasing elapsed time, the
amount of dissolved hydrogen chloride decreases.