In a lab, a substance was cooled by 36 c over a period of 9 hours at a constant rate . What was the changed in temperature each hour ?

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .