Use the estimated regression equation and descriptions below to find the Age at which weight is maximized. Note that Weight is measured in pounds and Age is measured in years. Assume both coefficients are statistically significant at the 5% level. Round your final answer to the nearest whole year and no units are needed (i.e, if you get 35.34 just enter 35). Weight = 7.8 +21Age - 0.19Age

Use the estimated regression equation and descriptions below to find the Age at which weight is maximized. Note that Weight is measured in pounds and Age is measured in years. Assume both coefficients are statistically significant at the 5% level. Round your final answer to the nearest whole year and no units are needed (i.e, if you get 35.34 just enter 35 ). Weight=7.8+21Age0.19Age2