Bobby draws an art work measuring 2.25 inches by 2 inches. He makes a copy of the art work enlarging it so that its dimensions are now 3.15 inches by 2.8 inches what scale factor did he use to create the copy of the original artwork? Answer in decimal

The scale factor can be calculated by dividing the dimensions of the copy by the dimensions of the original artwork.

For the width:
Original width = 2.25 inches
Copied width = 3.15 inches
Scale factor for the width = Copied width / Original width = 3.15 inches / 2.25 inches ≈ 1.4

For the height:
Original height = 2 inches
Copied height = 2.8 inches
Scale factor for the height = Copied height / Original height = 2.8 inches / 2 inches = 1.4

Therefore, the scale factor used to create the copy of the original artwork is approximately 1.4.