As a cells size increases it’s amount of dna also increases

No. The amount of DNA is determined by the species of the organism, not the size of its cells. All cells of the same organism have the same amount of DNA, except for its gametes, which have half the amount of DNA. Also, as a cell grows after mitotic cell division, the amount of DNA remains the same for that species, and does not increase.

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.

it takes hundreds of years to become stable.

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