The scale factor that the company used was 0.028
Given the following parameters
Area of truck wheel = 32411 square inches
Area of the truck after scaling = 911 square inches
The formula for finding the scale factor will be;
k = final area/original area
k = 911/32411
k = 0.028
Hence the scale factor that the company used was 0.028
Learn more on scale factor here; https://brainly.com/question/10253650