Answer:
Step-by-step explanation:
a:
The whale starts swimming upward from a depth of 35 feet below the surface and jumps to a height of 17 feet above the surface.
Elevation means the height from the surface.
The whale is 17 feet above the surface.
Hence, the whale's elevation, r = 17.
b:
The whale covers a total distance of (17 + 35) = 52 feet from beginning.
Someone can mistakenly think that the elevation is 52 feet.
52 feet is the total covered distance, where as elevation means the height from the surface of the water.
Hence, here the elevation of whale is 17 feet.
