Is it a, b, c, or d , don’t explain just tell me the answer

Sketch the region bounded by the curves, and visually estimate the location of the centroid. (do this on paper. your instructor may ask you to turn in this work.) then find the exact coordinates of the centroid. y = ex y = 0, x = 0, x = 5

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.

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?