Healthy eating is a critical component of healthy aging. When should one start eating healthy? It turns out that it is never too early. For example, babies who...

Two straight lines pass through the origin (x0, y0) = (0,0). One of them passes through the point (x1, y1) = (1,3) and the other passes through the point (x2,...

If p ∶ q = 1 ∶ 2 q ∶ r = 4 ∶ 3 r ∶ s = 4 ∶ 5 and u is 50% more than s, what is the ratio p ∶ u?