Rewrite as .

Rewrite as .

Use logarithm rules to move out of the exponent.

Logarithm base of is .

Multiply by .

Expand log base 2 of 20

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# Expand log base 2 of 20

Rewrite as .

Rewrite as .

Use logarithm rules to move out of the exponent.

Logarithm base of is .

Multiply by .

Expand log base 2 of 20