The formula y = 3.1 √ x + 12 models the percent of U.S. adults who are considered obese by federal guidelines, where x i

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The formula y = 3.1 √ x + 12 models the percent of U.S. adultswho are considered obese by federal guidelines, where x is thenumber of years after 1985, and y is the percent of obese adults.In this equation, y is already converted from a decimal, so, forexample, a 55% obesity rate would correspond to y = 55. Accordingto this formula, in what year was the obesity rate 21.8 percent?The obesity rate was 21.8% in the year . Round to the nearestactual year.