How does magnetism play a role with the earth itself

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.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

idk im sorry.