Knowlesga Check Question 3 Two trains leave stations 532 miles apart at the same time and travel toward each other. One train travels at 105 iniles per hour while the other travels at 85 miles per hour. How long will it take for the two trains to meet? Do not do any rounding.

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. \( \begin{array}{llll}\times 1.3^{2} & \times 1.6 & \times 1.06 & \times 1.03^{2}\end{array} \)

Which of the following is equivalent to \( \log \left(\frac{1}{x y}\right) \) ? (1 point) \( 1-\log x-\log y \) \( \log x-\log y \) \( -\log x-\log y \) \( -\log x+\log y \)

Use logarithms to solve the equation for \( t \). R \( e^{0.27}=8 \)