<h3><em>Answer:</em></h3><h3><em>40</em></h3><h3><em>Step-by-step explanation:</em></h3><h3><em>The surface of the ocean would be 0.</em></h3><h3><em></em></h3><h3><em>Taking this into account, 12 meters below would be 0 - 12, which is -12. Therefore A's elevation would be -12.</em></h3><h3><em></em></h3><h3><em>For the sea bird, 28 meters above the surface, which is again 0, would be 0 + 28. B's elevation is 28.</em></h3><h3><em></em></h3><h3><em>Since the fish is 12 meters below the surface and the sea bird is 28 meters above the surface, simply add the two numbers up to get a total of 40 meters. C would be 40 meters.</em></h3>
Taking this into account, 12 meters below would be 0 - 12, which is -12. Therefore A's elevation would be -12.
For the sea bird, 28 meters above the surface, which is again 0, would be 0 + 28. B's elevation is 28.
Since the fish is 12 meters below the surface and the sea bird is 28 meters above the surface, simply add the two numbers up to get a total of 40 meters. C would be 40 meters.
