Answer: 12.68 glasses
Explanation: To find out how many 8 oz glasses are in 3 liters, first convert liters to ounces. There are approximately 33.814 ounces in 1 liter. Therefore, 3 liters is:
\[
3 \text{ liters} \times 33.814 \text{ oz/liter} \approx 101.44 \text{ oz}
\]
Now, divide the total ounces by the size of each glass (8 oz):
\[
\frac{101.44 \text{ oz}}{8 \text{ oz/glass}} \approx 12.68 \text{ glasses}
\]
Thus, there are approximately 12.68 glasses of water in 3 liters.