Answer:
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Step-by-step explanation:
In this case in order to simplify we need to know what the "power rule of exponents" is. Simply speaking this rule states that when you raise a power to a power you multiply the exponents. So in our case we ill get the following
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In order to get 42 we used the power rule which I mentioned earlier.
Im not sure, you didn't put a question
The answer to this question is the mean increases by 3.