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

can you put the picture up?

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870