Next it would be 5,5,5,5,5. Because, when you go up one in numbers you also go up one the amount.
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0.04m² - n²
(0.2m)² - n²
<span>(0.2m + n)(0.2m - n)</span>
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Answer is 5^12 which is choice A (assuming you meant to put the ^ symbol)
The bases are the same (both are 5), so you add the exponents: 4+8 = 12. The base stays the same the entire time.
So, 5^4*5^8 = 5^(4+8) = 5^12