Is 1.57 a rational number

After two years, how much has been paid into interest?

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

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.