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?

Lake Segundo is 5/6 * 84 feet = <<5/6*84=70>>70 feet deep.

Thus, the elevation at the bottom of Lake Segundo is 84 - 70 = <<84-70=14>>14 feet. Answer: \boxed{14}.

To find the elevation at the bottom of Lake Segundo, we need to calculate 5/6 of the depth of Lake Profondo.

First, let's calculate 5/6 of the depth of Lake Profondo:

(5/6) * 84 = 420/6 = 70 feet.

Therefore, the elevation at the bottom of Lake Segundo is 70 feet.

To find the depth of Lake Segundo, which is 5/6 as deep as Lake Profondo, we need to multiply the depth of Lake Profondo by 5/6.

Step 1: Multiply the depth of Lake Profondo by 5/6
Depth of Lake Segundo = Depth of Lake Profondo * 5/6
Depth of Lake Segundo = 84 feet * 5/6

Step 2: Simplify the fraction
Depth of Lake Segundo = (84 * 5) / (6)
Depth of Lake Segundo = 420 / 6

Step 3: Divide and find the result
Depth of Lake Segundo = 70 feet

Therefore, the elevation at the bottom of Lake Segundo is 70 feet.