Carbohydates are essential in any diet because

Yes!

Explanation:

Carbohydrates are all about energy and are found in foods like fruits, vegetables, breads, pasta, and dairy products. Your body uses these foods to make glucose, which is your body's main energy source. "Carbohydrates provide the body with the energy it needs and are a good source of many vitamins and minerals.

I found this from, https://www.everydayhealth.com/weight/why-carbohydrates-are-important-for-your-diet.aspx

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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.