Using the values in the following table, derive second-order interpolating polynomials for estimating the snow-covered area (A) in percent as a function of the accumulated degreedays (D) in °C· Use...

Using the values in the following table, derive second-order interpolating polynomials for estimating the snow-covered area (A) in percent as a function of the accumulated degreedays (D) in °C· Use the method of undetermined coefficients· Estimate the value of A for D of 25 and 220· If the true values are 99% and 46%, respectively, compute the percentage of error·