Over a period of 120 days, Shawna Johnson earned $400

Last updated: 7/12/2022

Over a period of 120 days, Shawna Johnson earned $400 interest in a retirement account paying interest at a rate of 5%. Find (a) the principal at the beginning of the 120 days and (b) the amount in the account at the end of 120 days. (a) The principal was $ (b) The amount in the account at the end of 120 days is $.