Square root of 24, rounded to the nearest whole number?

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?

What is r i 4.5+10r=-6.5 with work pls

State one method by which you can recognize a perfect square trinomial.