Use trig ratios to find the missing sides. HELP FAST

Ihave trouble finding the nth term of a linear sequence

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square