Four points W, X, Y, and Z are chosen at random on a circle. Find the probability that chords WX and YZ intersect.

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?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section