Factor completely.25y4 - 81
A. (5y2 - 9)2
B. (5y2 + 9)2
C. (5y2 + 9)(5y2 - 9)
D. (25y2 + 1)(y2 - 81)
Answer: C
Mathematics
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Rewrite the following in its equivalent decimal form.5 ? 102 + 4 ? 10 + 7 ? 10-1 + 2 ? 10-2
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A. 
B. 
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