Question 1 use logarithms to solve the problem. how long will it take $12,000 to grow to $16,000 if the investment earns interest at the rate of 4%/year compounded monthly? (round your answer to two decimal places.) question 2 use logarithms to solve the problem. how long will it take an investment of $6000 to triple if the investment earns interest at the rate of 6%/year compounded daily? (round your answer to two decimal places.) question 3 use logarithms to solve the problem. find the interest rate needed for an investment of $5800 to double in 5 years if interest is compounded continuously. (round your answer to two decimal places.)