Find the missing side of each right triangle and round it to the nearest tenth

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?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

In what organelle does photosynthesis take place?