Evaluate the log without a calculator ( show your work )

the problem is in the image. i don't know how to write it.

4

Step-by-step explanation:

Given in the question a logarithm expression

We will use Exponent of Log Rule

here b = 7

        k = 16

So suppose

Now, according to the rule

16 = x²

to find x only take square root on both sides of the equation

x = √16

x = 4

so = 4

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4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4