2 answers:
Answer:

Step-by-step explanation:

When bases are same for exponents and it is multiplication, then add the exponents.


Explanation: Since these two powers have the same base of 4, you can multiply them together by simply adding their exponents to get 4⁻².
When applying your exponent rules, the bases don't change!
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Answer: 12:14 21:18 42:36