Find an exponential model for the account balance. (Let t be the time in months and B the savings balance in dollars. Round your parameters to three decimal places.) (e) Suppose that you made this...

Find an exponential model for the account balance. (Lett be the time in months andB the savings balance in dollars. Round your parameters to three decimal places.)

(e) Suppose that you made this investment on the occasion of the birth of your daughter. Your plan is to leave the money in the account until she starts college at age 17. How large a college fund will she have? (Round your answer to the nearest cent.)
$


(f) How long does it take your money to double in value? (Round your answer to two decimal places.)
 months


How much longer does it take it to double in value again? (Round your answer to two decimal places.)
 months