Mathematics, 24.11.2020 04:40, drhtgsehg6334

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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.

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Find a quadratic model for the data. Use 1981 as

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Find a quadratic model for the data. U...