I will mark brainy A speck of dust is 5.0 x 10^-7 m wide. Which of the following is the best way
to rewrite this quantity, using more appropriate units?
A. 5.0 x 10^-5 cm
B. 5.0 x 10^-4 mm
C. 5.0 x 10^-7 m
D. 5.0 x 10^-10 km

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

12x + 1 = 25 solve the following equation. then place the correct number in the box provided.

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.