18. three girls are selling cases of popcorn to earn money for a band trip. in week 1, emily sold 2 3/4 cases, brenda sold 4 1/4 cases and shannon sold 3 1/2cases.

Tyler reads 2/5 of a book on monday, 1/3 of it on tuesday, 2/9 of it on wednesday, and 3/4 of the remainder on thursday. if he still has 14 pages left to read on friday, how many pages are there in the book?

Convert the density of surface sea water to metric tons/cubic meter

In 1950, scientists estimated a certain animal population in a particular geographical area to be 6,400. in 2000, the population had risen to 7,200. if the animal population experiences the same percent increase over the next 50 years, what will the approximate population be? a) 8,000 b) 8,100 c) 8.400 d) 8.600