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. what was the percent error of ron’s estimate?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500