reich9369 reich9369 30-05-2024 Mathematics Answered Solve the problem. Find out how long it takes a $2800 investment to double if it is invested at 9% compounded quarterly. Round to the nearest tenth of a year. Use the formula Int A-P1+ 1) 7.6 years 2) 8.2 years 3) 7.8 years 4) 8 years