The standard deviation of the tap water data is 1.086. the standard deviation of the salt water data is 1.107. which explains why the standard deviation is the best measure of variability to use to compare the data?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

Ineed i been stuck on this question since yesterday