Answer part B

3.7.73 If a price-demand equation is solved for p, then price is expressed as p= g(x) and x becomes the independent variable. In this case, it can be shown that the elasticity of demand is given by E(x) = to find the values of x for which demand is elastic and for which demand is inelastic. g(x) xg'(x) p= g(x)=280-0.4x Demand is elastic for all x in the interval (0,350). (Type your answer in interval notation.) Demand is inelastic for all x in the interval (Type your answer in interval notation.) Question Help * Use the price-demand equation below