Answer:

Step-by-step explanation:
Consider a quadratic equation given by
.... (1)
The quadratic formula then is

The quadratic equation provided is

This can be expressed as
.... (2)
By comparing (1) and (2), we derive:

Plug these values into the quadratic formula.




Factoring out common elements.


The two solutions are
and 
We recognize that

Thus,

Consequently, root
is positive while
is negative.
The maximum distance visible on Earth is calculated using the formula
= your initial height and
= your secondary height
In this case,
represents the height of the periscope and
denotes the height of the ship, leading us to a distance of 832.45553203368 feet. However, rounding to the nearest mile yields the answer as 
If there are any discrepancies, please inform me and I will recalculate!
La respuesta es 4,13 al problema.