Question

`(1 * 10^{5)(6 * {10}{4}`



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Answer 1

Note that
`10^a\cdot10^b=10^(a+b)` or more general form,
`a^b\cdot a^c=a^(b+c)`.

`10^5\cdot6\cdot10^4=\boxed{6\cdot10^9}`

Hope this helps.