Enter the appropriate value to answer the question or 16. Graph the function \( f(x)=\sqrt{x+2}-5 \)

10 A number is increased by \( 3 \% \) and the result is then increased by \( 3 \% \) Which multiplier would you use to find the value after both increases? Circle your answer. \( \begin{array}{llll}\times 1.3^{2} & \times 1.6 & \times 1.06 & \times 1.03^{2}\end{array} \)

Simplify without a Calculator \[ \log _{5}\left(\frac{1}{625}\right)=\square \]

30. List the first five terms of the sequence defined recursively by \( a_{n}=\frac{a_{n-1}}{2}+2 ; a_{1}=68 \)

Evaluate using your calculator and round to 4 decimal places. \( \log _{8} 10=\square \)

The doubling period of a bacterial population is 15 minutes. At time \( t=80 \) minutes, the bacterial population was 60000 . What was the initial population at time \( t=0 \) ? Find the size of the bacterial population after 4 hours.