Ron is planning for the back-to-school rush at his store. last year he estimated that he would need 168 notebooks, but he sold 200 notebooks. explain how ron can find the percent error of his estimate.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *