What is the worked out solution to: find 5 1/2% of $2,800

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Write an equation for the function that includes the points (1,4/5) and (2,2/3)