Aparabola has its vertex at the origin and its focus at (0,5). what function does this graph represent?
1. f(x)= -1/20x^2
2.f(x)= (1/20x)^2
3.f(x)= 20x^2
4.f(x)= 1/20x^2

Sean is his dad build a tiled walkway in their backyard. the walkway will be 6060 feet long and 22 feet wide. the local hardware store sells tiles which are 22 by 22 feet and come in boxes of 66. how many boxes of tiles do they need?