How long will you need to wait until the value of a $1,000 investment doubles, if it earning 10.5% interest per year? 6.94 years 7.88 years No solution. Error. 5.46 years Question 10 3 pts What interest rate would you need to earn in order to become a deca-millionaire (worth $10,000,000 ) if you invested $1,000,000 today and wanted to be worth the total of ten million dollars in 15 years? 22.83% 14.56% No solution. Error. 16.59%