Which property or properties of arithmetic do you use when you calculate 3×70 by first calculating 3×7 = 21 and then putting a zero on the end of 21 to make 210? write equations to show which properties are used and where

Pleasseee important quick note: enter your answer and show all the steps that you use to solve this problem in the space provided. use the circle graph shown below to answer the question. a pie chart labeled favorite sports to watch is divided into three portions. football represents 42 percent, baseball represents 33 percent, and soccer represents 25 percent. if 210 people said football was their favorite sport to watch, how many people were surveyed?