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Find a quadratic model for the data. Use 1981 as year 0.

(a) Write the quadratic equation.

(b) Use your model when first class postage was 37 cents.

(c) Use your model to predict when first-class postage will be 50 cents. Explain why your prediction may not be valid.

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright