Write the expression in exponential notation.2 ? 2 ? 7 ? 7 ? 7
A. 2(2) ? 3(7)
B. 2 ? 7
C. 22 ? 73
D. 25 ? 75
Answer: C
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At what points is the given function continuous?f(x, y, z) = 
A. All (x, y, z) such that x2 + y2 ? 25 B. All (x, y, z) C. All (x, y, z) such that x2 + y2 ? 5 D. All (x, y, z) such that x2 + y2 ? 0
Find the distance between the pair of points. Give an exact answer.(-3, 5) and (-6, 1)
A. 6 units B. 10 units C. 5 units D. 25 units
Find the foci of the ellipse.
+ 
= 1
A. (0, -20), (0, 20) B. (-20, 0), (20, 0) C. (0, -15), (0, 15) D. (-15, 0), (15, 0)
Solve.If an earthquake measured 8.3 on the Richter scale, what was the intensity of the earthquake in terms of I0? The magnitude on the Richter scale of an earthquake of intensity I is 
A. 4020? I0 B. 199,526,231 ? I0 C. 19,952,623? I0 D. 158,489,319? I0