Solve the length and the scale factor.

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?

He concluded that a heavier object dropped from the same height as a lighter object will land

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)