Try ALL Questions!! \& follow BEDMAS \& Round all money answers to TwO decimals places \& Given the following situations, determine whether they represent exponential growth or exponential decay. a. Jenny invests \( \$ 5000 \) for college and earns \( 2 \% \) per year. b. A car's purchase price is \( \$ 25000 \) and it depreciates by \( 8 \% \) each year. c. A 400 gram mass of a bacteria culture doubles every 20 minutes d. 250 grams of a radioactive isotope has a half-life of 1.5 hours

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.

Find the domain and range of \( y=\log _{2}(8-4 x) \).

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 \( a_{n}=\frac{a_{n-1}}{2}+2 ; a_{1}=68 \)