For what intervals is f(x)=xe^-x concave down?

Consider the following estimates from the early 2010s of shares of income to each group. country poorest 40% next 30% richest 30% bolivia 10 25 65 chile 10 20 70 uruguay 20 30 50 1.) using the 4-point curved line drawing tool, plot the lorenz curve for bolivia. properly label your curve. 2.) using the 4-point curved line drawing tool, plot the lorenz curve for uruguay. properly label your curve.

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?