Hurry this was due yesterday

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Math question.. plz me .. best answer all