Factor.a6 - 64b6

A. (a + 2b)(a - 2b)(a4 + 4a2b2 + 16b4)
B. (a + 2b)(a - 2b)(a2 + 2ab + 4b2)(a2 - 2ab + 4b2)
C. (a2 - 4b2)(a4 + 4a2b2 + 16b4)
D. (a3 + 8b3)(a3 - 8b3)


Answer: B

Mathematics

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At one high school, the mean time for running the 100-yard dash is  with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 17 seconds

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Solve the inequality, giving its solution set in both interval and graph forms.0 < 5y ? 20  

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B. [0, 4]

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D. (0, 4]

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Specify the center and radius of the circle.(x + 1)2 + (y + 2)2 = 3

A. center: (-1, -2); radius: 3
B. center: (1, 2); radius: 3
C. center: (1, 2); radius: 
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