Answer:
constant.
Step-by-step explanation:
like natural constants like pi or e.

Integrating gives

To compute the integral, substitute
, so that
. Then

Since
for all
, we can drop the absolute value, so we end up with

Given that
, we have

so that

The girls are closer. Her feet are 1/2 the distance away from the surface pool, the boys are 3/4 away.