8. The time required to grow a certain bacteria in a culture beginning with 20 bacteria is In D-In 20 0.642 where # is the number of bacteria and : is the time in hours. How much time is required to grow a culture of 13,500 bacteria? Show your work: 9. Suppose that a flu virus spreads according to the model y = 10000e- 00935 where y represents the number of people infected at any time / where ? is given in hours. In how many days will 45,000 be infected? Show your work: Given the following logarithmic equation, think about how you would solve each one. Now, describe those processes using at least 3 to 4 sentences. Then solve, showing your work. 10. Equation 1: log 2 + log x = log 3 Description of problem solving process: Answer = Show your work