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Write the equation used to solve the following problem. Robert’s father is 4 times as old as Robert. After 5 years, father will be three times as old as Robert. Let x= Robert's ageJoe and Beth deposit 4,187.00 into a savings account which earns 12.89% interest compounded monthly. They want to use the money in the account to go on a trip in 3 years. How much will they be able to spend?Shawn opened a savings account 1 year ago. The account earns 4% interest, compounded continuously. If the current balance is 100.00, how much did he deposit initially?Find the amount in the account for the given principal, interest rate, time, and compounding period.Pequals1,000, requals2.3%, tequals4 years; compounded continuouslyPorter and Sadie deposited 6,000.00 into a savings account which earns interest compounded monthly. After 2 years, they had 6,803.00 in the account which they used to go on a trip. What was the interest rate on the account?Round your answer to the nearest tenth of a percent.