What is the marginal benefit of consuming one additional slice of pizza if the first slice provided satisfaction rated at 10 utility and the second slice provided satisfaction rated at 6 utility?

The marginal benefit of consuming one additional slice of pizza is the extra satisfaction you get from eating that slice. In this case, the first slice gave you 10 units of satisfaction, and the second slice gave you 6 units. To find the marginal benefit of the second slice, you look at the difference in satisfaction between the two slices, which is 6 utility from the second slice minus 10 utility from the first slice. However, since we are only interested in the benefit of the second slice, we can simply say that the marginal benefit of that slice is 6 utility. This means that while the first slice was more satisfying, the second slice still provided some enjoyment, but less than the first.