Simplify the logarithmic expression: \( \text{\log}_{10}(1000) - \text{\log}_{10}(10) \)

Calcule \( \log_{5}(125) \) usando a propriedade da mudança de base.

20. Vereinfache im Kopf. \( \begin{array}{lll}\text { a) }\left(5^{\frac{4}{5}}\right)^{\frac{5}{2}} & \text { b) }\left(36^{\frac{3}{4}}\right)^{\frac{2}{3}} & \text { c) }\left(49^{-\frac{6}{7}}\right)^{\frac{7}{12}}\end{array} \)

Evaluate the function at the given values of \( x \). Round to 4 decimal places, if necessary. \[ g(x)=9^{x} \] Part: \( 0 / 4 \) Part 1 of 4 \( g(-3)=\square \)

Simplify the expression without using a calculator. \( \log _{2} 64= \)

Simplify the expression without using a calculator. \( \ln e^{2}=\square \)