A Metal Washer of (Outer) Radius R Inches Weighs

question 79

Multiple Choice

A metal washer of (outer) radius r inches weighs ounces. A company manufactures 2-inch washers for different customers who have different error tolerances. If the customer demands a washer of weight ounces, what is the error tolerance for the radius? That is, find such that a radius of r within the interval guarantees a weight within .

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