College Fund When Marcus started high school his grandmother

Last updated: 1/6/2023

College Fund When Marcus started high school his grandmother opened a college savings account On the first day of each school year she deposited money into the account 1000 in his freshman year 600 in his sophomore year 1100 in his junior year and 900 in his senior year The account earns interest of r at the end of each year When Marcus starts college after four years he gets the balance of the savings account plus an extra 500 a If r is the annual interest rate of the bank account the at the end of the year the balance in the account is multiplied by a growth factor of x 1 r Find an expression for the total amount of money Marcus receives from his grandmother as a function of this annual growth factor x