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Problem 4. The news this morning stated that ination had reached 7.5% per year. Sup- pose the lumber needed to build a house is presently

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Problem 4. The news this morning stated that ination had reached 7.5% per year. Sup- pose the lumber needed to build a house is presently priced at $35,600. (a) How fast is the cost of the lumber rising measured in dollars per year? (b) Use this information to estimate what the cost will be three months from now

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