Quadrilateral JKLM has vertices J(0,3) K(1,4) L(2,1) and M(1,0) determine if quadrilateral JKLM is a parallelogram

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

Someone me i need with this stuff

Consider circle o, where and . m∠bpd °. °.