The outer radius of a cyrindrical metal tube is R and t is the thickness of the metal. a. Show that the volume V, of metal in a length, l units, of the tube is given by V =πlt(2R-t). b. Hence calculate V when R =7.5, t=1 and l = 20.​

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

How many lines can be drawn through points j and k? 0 1 2 3

Which system of linear inequalities is represented by the graph?