Lake Profondo has a depth of 84 feet. Lake Segundo is 5/6 as deep. What is the elevation at the bottom of Lake Segundo? (Remember, the elevation is below sea level. Account for this in your answer.)

Answer 1

Lake Segundo is 5/6 * 84 feet = <<5/6*84=70>>70 feet deep.
Since the elevation is below sea level, the elevation at the bottom of Lake Segundo is -70 feet. Answer: \boxed{-70}.