Answer:
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Step-by-step explanation:
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Answer: a) 138.32 and b) 35 years approx.
Step-by-step explanation:
Since we have given that

So, Profit is given by

Difference in years of 1990 and 2020=30
So, Profit becomes :

(b) How long before the profit found in part (a) is predicted to double? (Round your answer to the nearest whole number.) years after 1990.
So, profit doubles , we get :

Hence, a) 138.32 and b) 35 years approx.
<em><u>Sorry </u></em><em><u>but </u></em><em><u>can't</u></em><em><u> </u></em><em><u>understand</u></em>