Find an equation for the hyperbola described.Vertices at (±6, 0); foci at (±8, 0)

A.   -  = 1
B.   -  = 1
C.  -  = 1
D.  -  = 1

Answer: B

Mathematics

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Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.

A.  < 4.37 × 10-2
B.  < 3.28 × 10-1
C.  < 1.02 × 10-1
D.  < 6.55 × 10-2

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Mathematics

Change the logarithmic expression to an equivalent expression involving an exponent.log1/39 = -2

A. 2 = 9
B. -2 = 9
C. 91/3 = 2
D. (-2)1/3 = 9

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Mathematics

Solve.An earthquake had an intensity  times more powerful than a reference level earthquake, or  What was the magnitude of this earthquake on the Richter scale?  The magnitude on the Richter scale of an earthquake of intensity I is 

A. 14.5 B. 16.3 C. 6.3 D. 3.7

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Mathematics

Evaluate.x + y, when x = 4 and y = -9

A. 13 B. -36 C. -5 D. -13

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Mathematics