Robert painted 27 sections of the backyard fence. He painted 45% of the total fence.
How many sections make up the backyard
fence? (Use a model to solve the problem.)

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)