chimona123a chimona123a 20-05-2020 Mathematics contestada Thomas is building rectangular boxes. The table shows the area in square feet, f(x), of the bottom of a box when one side of the box is x feet long. x 1 2 3 4 5 f(x) 2 8 18 32 50 A f(x)= x^2+2x B f(x)= x^2/2 C f(x)=2x^2 D f(x)=2x