For each of the described curves, decide if the curve would be more easily given by a polar equation or a cartesian equation. then write an equation for the curve. (a) a line through the origin that makes an angle of π/3 with the positive x-axis.

Mary and roberto bought identical backpacks at different stores. mary's backpack originally cost $65 and was discounted 25%. roberto's backpack originally cost $75 and was on sale for 30% off on the original price. which backpack was the better buy?