The reflection coefficient hits 100% exactly at the critical angle. More rigorously, consider that an analysis of the boundary conditions at the interface requires that the two polarizations of light have reflectances:
Distance from Ruskin, FL to Palmetto, FL 18 Miles or 29 Km. How many hours? 24 mins
There are approximately 151.38 miles from Ft Myers, FL to Miami,  FL. The driving time is an estimated 2 hours and 43 minutes.