If you have 4 ounces, how many grams do you have?

When converting ounces to grams, it is essential to use the correct conversion factor. One ounce is approximately equal to 28.35 grams. To find out how many grams are in 4 ounces, you would multiply the number of ounces by the conversion factor:

4 ounces × 28.35 grams/ounce = 113.4 grams.

This calculation shows that when you have 4 ounces, you indeed have 113.4 grams. This precise conversion reflects the metric system's relationship to the customary system used in the United States. Therefore, the correct answer is the first choice, reflecting an accurate understanding of these measurement conversions.