One town is 20 feet above sea level. Another town is 10 feet below sea level. Are these opposite quantities whose sum is 0? Respond 1 if these quantities are opposites. Respond 2 if these quantities are not opposites.(1 point)

2

To determine if two quantities are opposites, we need to check if their values have the same magnitude but opposite signs.

In the given scenario, the first town is 20 feet above sea level, which means its value is positive (+20 feet), while the second town is 10 feet below sea level, indicating a negative value (-10 feet).

The magnitudes of these values are 20 feet and 10 feet, respectively, and their signs are opposite. Therefore, these quantities are indeed opposites.

Hence, the correct answer is 1.