Ross uses a tip calculator to figure his tips, but he thinks it is not working accurately. The tip calculator says that a $8 tip is necessary for a $80 meal at a 15% tip rate. Is the calculator working correctly? How do you know?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers