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(31A) Logarithms in base a

Evaluate.

$5^4$

Evaluate.

$\log _{2}16=$

Evaluate. Give your answers as fractions.

$4^{-2}$

Evaluate.

$\log _{9}\frac{1}{729}=$

Evaluate. Give your answers as fractions.

$216^{\frac{1}{3}}$

Evaluate. Give your answers as fractions.

$\log_{1000}\frac{1}{10}$