Answer: D
Step-by-step explanation:
Let the side of one edge of tile = a cm.
So area of tile = (side)^2 =
But area of tiles = 900 square centimeter.
So


So side of one edge of tile is = 30 cm
14.04 US dollars or 14 4/10
It is clear that (AB) is a median, and it is obvious that the angle is 90, thus it is an altitude and a perpendicular bisector