Jorge made a model of a cell in a clear plastic zipper bag. He used a plum for the nucleus and kidney beans for mitochondria. Why is this model helpful for learning about cells?

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

i'd say that the moon rock is about 2.2 billion years old.

not sure if this is what you'r looking for eubacteria and archaebacteria