The average length of the outer ear for men can be modeled as f(x) = 0.89 + 0.495 In x inches where x is aligned input so that x(a) = a + 10 and a years is age, data from 0 < a < 70.† Calculate the average ear length and the rate of change of ear length for 30-year-old men. (Round your answers to three decimal places.) f(x(30)) X inches %3D df X inches per year %3D da a = 30 Write a sentence of interpretation for these results. (Round your answers to three decimal places.) inches and is increasing by approximately X inches per year. The average outer ear length for 30-year-old males is approximately

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