while standing on top of a hill at a ski resort, lisa spots thr ski lodge below. if the vertical height of the hill is 1209 feet and the angle of depression is 53, how many feet must lisa ski in order to reach the lodge

Find the sum of the following series. round to the nearest hundredth if necessary.

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?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.