BÀI TÂP CUỐ CHƯON 1. Sử dựng số nguyên âm để thề hiện các tình huống sau: a) Nợ 150 nghìn đồng; b) 600 m dưới mực nước biển; c) 12 độ dưới \( 0^{\circ} \mathrm{C} \).

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?

AUTOEVALUACION Opera. \[ (-3)^{-2}+\left(\frac{3}{4}\right)^{-1}-2^{-3}\left(1-\frac{1}{2}\right)^{-2} \]

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

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

de \( \frac{2}{3} \cdot\left(6-\frac{1}{4}\right) ? \)