Mold on a loaf of breads grows exponentially at a rate or 2% every 4 hours. Given that there were 5mg of mold to start with, which expression can be used to determine how much mold is present after 2 days?
O A= 5(1 +.02)^6
O A=5 (1 +.02)^2
O A=5 (1 +.02)^4
O A=5 (1 +.02)^12