Please help me with this

Alake near the arctic circle is covered by a sheet of ice during the cold winter months. when spring arrives, the ice starts to melt. s(t) models the ice sheet's thickness (in meters) as a function of time tt (in weeks). s(t)=-0.25t+4

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane