Answer:
The length of the waterline when hull speed is 4 knots per hour in feet is 2.985 feet.
Explanation:
Let the function
, where
is the length of the waterline, measured in feet and
is the hull speed of the boat, measured in knots per hour. If we know that
, then the length of the waterline is:



The length of the waterline when hull speed is 4 knots per hour in feet is 2.985 feet.