Students conducted an experiment using these steps.
Step 1: They measured the number of seconds each student took to count forward from 0 to 100.
Step 2: They measured the number of seconds each student took to count backward from 100 to U.
Step 3: They calculated the difference, in seconds, between counting forward and counting backward for
each student.
The two histograms show the differences, in seconds, for the boys and for the girls.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0