Answer:

where x is the number of days and y is the total fall and rise in the tides.
Step-by-step explanation:
We are given the following in the question:
In one day, the tide rises twice and falls twice.
Rise in tides given by R,
R = 53.478 feet
Fall in tides given by F,
F = 53.478 feet
Total rise in tide in 1 day =

Total fall in tide in 1 day =

The fall and rise in the tides can expressed with the function:

where y is the total fall and rise in tides and x is the number of days.
The attached image shows the graph for the cycle of tides.
Putting x = 1 for 1 day, we have,

Thus, total fall and rise in 1 day is 0 feet.