I need to know the step by step and answer pls and thanks

(a)

In this question, you can simply just multiply the exponent of 2 and the exponent of 5, in order to get a power of 10.

(b) For this question, we need to organize the numbers as a fraction

We need to subtract the exponents from each variable. In and y, we need to subtract 3-1 to get . In and , we need to subtract 7-3 to get . Now, we can divide 12 and 6 normally to get 2. So, the answer would be .

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