A can of paint will cover 400 square feet. What is the length of the edge of the largest square that can be painted with this can of paint?

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?

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?