Find an equivalent equation in polar coordinates.x = 8

A. r = 8 csc ?
B. r = 8 cos ?
C. r = 8 sec ?
D. r = 8 sin ?


Answer: C

Mathematics

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Decide whether or not the ordered pair is a solution of the equation.x - y = 9; (3,2)

A. Yes B. No

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Solve.An earthquake was recorded with an intensity which was  times as powerful as a reference level earthquake, or  What is the magnitude of this earthquake on the Richter scale? The magnitude of an earthquake of intensity I is defined as , where Io is a minimum level for comparison.

A. 3.9 B. 0.49 C. 4.9 D. 11.3

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Find the nth term an of the geometric sequence.1, , 13, 13, . . .

A. an = 13n-1 B. an = 13n/2 C. an = 13(n+1)/2 D. an = 13(n-1)/2

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Find percent notation for the number in decimal notation.0.12 of seniors at Elmwood High School spend more than two hours per day on the Internet.

A. 0.0012% B. 120% C. 12% D. 1.2%

Mathematics