Aboy with mass 25kg climbs into a small tree. he sits on a branch that is 2.0 m above the ground. what is his gravitational potential energy with respect to the ground

What is the value of x when x + 7 = 21?

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

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units