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If `5^(n-3)=625`, then `5^(n+3)` is _____.

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If `5^(n-3)=625`, then `5^(n+3)` is _____.
A. `5^(12)`
B. `5^(9)`
C. `5^(10)`
D. `5^(15)`
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Correct Answer - C
Given,
`5^(n-3)=625`
`implies 5^(n-3)=5^(4)`
`implies n-3=4 implies n=7`
Now, `5^(n+3)=5^(7+3)=5^(10)`
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