Answer:
A
Step-by-step explanation:
Using the rule of exponents
×
⇔
, thus
Given
×
=
, that is
= 
Since the bases are the same equate the exponents
4 + m = 8 ( subtract 4 from both sides )
m = 4 → A
Answer:

Step-by-step explanation:

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Answer:
answer is 5
Step-by-step explanation:
I understand it