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10^5 means 10x10x10x10x10.

10^3 means 10x10x10.

Multiplying them together is 10x10x10x10x10 x 10x10x10

which is 10^8.

In general, x^a times x^b is x^(a+b).

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10y ago
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Q: What is ten to the fifth power times ten to the third power as a single power?
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