Multiply the expressions.(x - 6)(x + 6)

A. x2 - 36
B. x2 - 12x - 36
C. x2 - 12
D. x2 + 12x - 36


Answer: A

Mathematics

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Use the ratio test to determine if the series converges or diverges.

A. Converges B. Diverges

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Add.7 + (-15)

A. 22 B. -22 C. -8 D. 8

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Solve the problem.A certain electronic air cleaner is capable of filtering x liters of air per second and the percentage of the contaminants that are removed from the air may be calculated by  where  Graph f in [0,85,5] by  Then, use the intersection-of-graphs method to estimate the x-values where 75% to 95% of the pollutants are removed.

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A. 75% to 95% are removed when
about 36 to 47 liters of air are
filtered.

B. 75% to 95% are removed when
about 25 to 33 liters of air are
filtered.

C. 75% to 95% are removed when
about 45 to 56 liters of air are
filtered.

D. 75% to 95% are removed when
about 27 to 36 liters of air are
filtered.

Mathematics