These | | simple mean absolute value. Absolute value is simply the number positive, for example, the absolute value of -3 is simply 3
Answer:
Initial height of the anchor is 75 meters.
Step-by-step explanation:
We are given the following in the question:

where, I is the anchor's elevation in meter after t seconds dropped from the ship.
We have to find the initial height of anchor that is we have to put t = 0 in the equation.
Putting t = 0, we get,

Thus, initial height of the anchor is 75 meters.
Each side of the board would have to be at least 36