Chapter 6 Rational Exponents and Radical Functions - 6.3 Perform Function Operations and Composition - 6.3 Exercises - Problem Solving - Page 433: 43

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Given $r(w)=\frac{1.1w^{0.734}}{b(w)-d(w)}$ Substitute: $w=\frac{1.1w^{0.734}}{0.007(w)-0.002(w)}\\=\frac{1.1w^{0.734}}{0.005(w)}\\=220w^{-0266}$ For body weights of 6.5 grams, $220w^{-0266}=220(6.5)^{-0266}\approx133.72$ For body weights of 300 grams, $220w^{-0266}=220(300)^{-0266}\approx48.25$ For body weights of 70000 grams, $220w^{-0266}=220(70000)^{-0266}\approx11.31$