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Step-by step explanation -

Here is the answer hope this helps!

The number of years is 15 years

Step-by-step explanation:

Given;

Principal amount invested, P = $1,000

rate, r = 8 % = 0.08

Amount at the end of the investment period, A = $2,200

interest on the investment, I  = Amount - Principal

I = A - P

I = $2,200 - $1,000

I = $1,200

Using the formula I = P r t

t = I / pr

t = (1200) / (1000 x 0.08)

t = 15 years

Therefore, the number of years is 15 years