18. On April 17 Anita Morales had her rugs cleaned by Aero Rug Cleaners. The cost was $135. The previous balance in her checkbook register is $218. If Morales pays Aero Rug Cleaners with a check, what is the new balance?
A $135
C. $383
B. 983
D. 597

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.