According to the study unit, the commutative property means a. the way the numbers are grouped does affect the sum. b. the order in which you add the numbers does affect the sum. c. the order in which you add the numbers doesn't affect the sum. d. the way the numbers are grouped doesn't affect the sum

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?