Zack created a model of his dads truck using a scale of 1 inch : 3 feet if the width of the model truck is 2.4 inches than the width of zacks dad truck is how much feet

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.