Chapter 12 - Section 12.8 - Exponential and Logarithmic Equations and Problem Solving - Exercise Set - Page 897: 42

67.2 inches

$w=0.00185h^{2.67}$ $w=140$ $w=0.00185h^{2.67}$ $140=0.00185h^{2.67}$ $140/0.00185=0.00185h^{2.67}/0.00185$ $75675.675=h^{2.67}$ $\sqrt[1/2.67] {75675.675} = \sqrt[1/2.67] {h^{2.67}}$ $75675.675^{1/2.67} = h^{(1/2.67)*(2.67)}$ $75675.675^{1/2.67} = h$ $75675.675^{.3745} = h$ $67.169 =h$