A rock is thrown into a lake from a bridge 133 feet above the lake's surface. The rock sinks 78 feet below the lake's surface. What is the difference between the elevations?
The elevation at which the rock is thrown is 133 feet above the lake's surface, and the elevation at which the rock sinks is 78 feet below the lake's surface.
To find the difference between the elevations, we need to add the depth at which the rock sinks to the height at which it is thrown.
133 feet (thrown) + 78 feet (sunk) = 211 feet.
Therefore, the difference between the elevations is 211 feet.
To find the difference between the elevations, we need to subtract the depth at which the rock sinks from the initial height from which it was thrown.
Initial height above the lake's surface = 133 feet
Depth at which the rock sinks = 78 feet
Difference between elevations = Initial height - Depth at which the rock sinks
Difference between elevations = 133 feet - 78 feet
Difference between elevations = 55 feet
Therefore, the difference between the elevations is 55 feet.