Express the polar equation \(r=\cos 2\theta\) in rectangular coordinates. Find the maximum height above the \(x\)-axis of the cardioid \(r=1+\cos \theta\text{.}\) Sketch the graph of the curve whose ...

Imagine you lined up every human being in the world by income, divided them into 100 groups ("percentiles") ranging from lowest to highest, and asked: How has the last generation of economic growth ...