Two cars leave an intersection at the same time. one is headed south at a constant speed of 24 miles per hour, the other is headed west at a constant speed of 70 miles per hour (see the figure). express the distance d between the cars as a function of the time t. (hint: at t = 0 the cars leave the intersection.)

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.