What set of reflections would carry triangle abc onto itslelf?

y axis, x axis, y axis, x axis

Explanation:

Reflecting an object over the y axis twice will have it end up in its starting position. The same can be said for the x axis as well. It doesn't matter that the x axis reflections aren't grouped next to each other, nor the y. So in a sense, two x axis reflections undo each other, so do the y axis reflections, and we end up with the same image as shown in the diagram.

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

6e14 is the answer.