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(31A) Logarithms in base a

Evaluate.

$7^3$

Evaluate.

$\log100=$

Evaluate. Give your answers as fractions.

$3^0$

Evaluate.

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

Evaluate. Give your answers as fractions.

$25^{-\frac{1}{2}}$

Evaluate. Give your answers as fractions.

$\log_{49}7$