How can you tell when a pattern shows counting by tens ?

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

What are the domain and range of f(x)=[1/5]x

What is the factored form of the following expressions? d^2 – 13d + 36