12. Bernardo gastou em uma loja \( \frac{3}{7} \) do seu dinheiro, ficando com 50 reais. Quantos reais Bernardo possula inicialmente? a) 80,00 b) 87,50 c) 90 d) 92,50 e) 95,00

Use the properties of logarithms to expand the expression. \( \ln \left(5 m^{6}\right) \) \( \ln \left(5 m^{6}\right)=\square \)

A town has a population of 16000 and grows at \( 4.5 \% \) every year. What will be the population after 8 years, to the nearest whole number?

Complete the conjecture that describes the pattern in the sequence. \( 4,8,12,16,20 \)

Determine whether the following equation defines \( y \) as a function of \( x \). \[ \begin{array}{l}x^{2}+y^{2}=121 \\ \text { Yes noes the equation } x^{2}+y^{2}=121 \text { define } y \text { as a function of } x \text { ? } \\ \text { No }\end{array} \]

Evaluate each expression. \[ \begin{array}{l}\text { (a) } \log _{7} \frac{1}{7}=\square \\ \text { (b) } \log _{3} 27=\square\end{array} \]