3. A drone takes off from the base of a mountain at a height of 27 ft below sea level. The drone then flies up 642 ft before landing at the top of the mountain. How tall is the mountain?

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

Can someone tell me if this is perpendicular? !

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents