1. Suppose it takes 5 years for a $20,000 investment using continuous compound interest to double a) Find the interest rate (leave answer in exact form)b) Find a formula A(t) for the amount of money in the account after t yearsc) Find a formula for the rate at which the account is growing after t years.d) How fast is the account growing after 8 years (round answer to two decimal places)2. Picture below

Find the derivative a) f(x) e 3x