I ussually dont need help for the types of question, but I am having alot of diffuculty isolating r by itself on one side of the = sign.
Assume a person invests $210 at the end of each year for 10 years at an annual interest rate of r. The ammount of money, A, in the account after 10 years is
A =
his goal is to have 3089 in his account after 10 years.