1. the shaded area on the grid below
represents the part of a floor that is
tiled. each square has the same
dimensions.
what percentage of the floor is tiled?

B, 0.4 repeats so it is rational and square root of 16 is 4 so that is rational as well.

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0