Sam is a waiter at a local restaurant where he earns wages of $6 per hour. sam figures that he also earns about $2.50 in tips for each person he serves. sam works 4 hours on particular day.
if n represents the number of people sam serves that day, which of the following functions causes sam use to figure e, his total earnings for a day

How to do this , and can some one explain

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3