A women sold two briefcases at Rs 990 each . If she gained 10% in one and lost 10% in the other, find the gain or loss percentage she made.

Volume of a cylinder with a radius of 13 in and height of 30 in

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

What number is 7 units left of -15?