Answer:
the bottom one my dude. hope it helps!
The correct answer is A.
Step-by-step explanation:
According to the power rule for logarithms, the logarithm of a power can be simplified by writing it as the product of the exponent multiplied by the logarithm of the base.
For example;

Hence in this case,

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Logarithms : brainly.com/question/11535704
Keyword : log
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X=1
The length of line DF is 18