Find an inequality |x − b| < a or |x − b| > a for which the given interval is its solution set. (-5,9). can you explain it, i don't know how to do it.

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

Abee with velocity vector r'(t) starts out at (5, −5, −3) at t = 0 and flies around for 5 seconds. where is the bee located at time t = 5 if 5 0 r'(u)du = 0?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.