1.Find the median of the random variable with the probability density function given below. (Round your answer to four decimal places.)

f(x) =0.09e^0.09x on[0, +)

2.Find the median of the random variable with the probability density function given below. (Round your answer to four decimal places.)

f(x) =1/x on[1,e]

3.Assuming that workers' salaries in your company are uniformly distributed between$35,000and$75,000per year, calculate the average salary in your company.

$______________

4.Investments in junk bonds are declining continuously at a rate of4%per year. How long will an average dollar remain invested in junk bonds?

___________yr