The lifeguard at a public beach has 400m of rope available to lay out a rectangular restricted swimming area using the straight shoreline as one side of the triangle. a.) If she wants to maximize the swimming area, what will the dimensions of the rectangle be? b.)To ensure the safety of the swimmers, she decides that nobody should be more than 50m from shore. What should the dimensions of the swimming area be with this added restriction?.... What do i doo? A is supposed to be 100m by 200m..and b is 50m by 300m...i can't get those at all though!