3 centimeters is the same as 30 millimeters, because there is 10 millimeters in every centimeter. in order to figure out how much the plant grew, you divide 3 centimeters by ten, or 30 millimeters by 10, which is easier.
30 divided by 10 is 3, so the plant grew 3 millimeters every day.
He would make more money with Susie than by himself because if he only works three hours and Susie make more money than him she would have more but if they work as a team they could split the money and get more together.
