in a school library, 10% of the fiction books and 15% of the non-fiction books are new. given that the ratio of fiction books to non-fiction books is 9:5 and that there are 660 new books, what is the total number of books in the library

Abee with velocity vector r'(t) starts out at (5, −5, −3) at t = 0 and flies around for 5 seconds. where is the bee located at time t = 5 if 5 0 r'(u)du = 0?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2