Charlie purchases a box of cereal for $3.98, hamburger for $5.76, tomatoes for $2.87, and milk for $4.46. he has $20 with him. about how much change should he expect to receive? plz !

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 distance between point a and b

Find all the angles that satisfy the equation cos(θ)=32