“there are several approximations used for pi, including 3.14 and 22/7. pi is approximately 3." a. label pi and the two approximations on the number line. «–-—» 3.140 3.141 3.142 3.143 b. which of the two approximations is a better estimate for pi? explain. c. find a whole number x in x/113 so that the ratio is a better estimate for pi than the two given approximations.