Tanishas IRA earns 8% per year. Tanisha deposits $2000 annually in her IRA until she turns 31. She does not put another penny in her IRA after she turns 31. Isaac continues to spend $2000 on various activities and items each year until he turns 31. At age 31, Isaac decides its time to start saving. He opens an IRA with an initial deposit of $2000 and gets the same 8% interest rate that Tanisha earned. Isaac continues to invest $2000 every year until he turns 65. Please work and formula.