A 90% confidence interval is found to be (72,78) what is the margin of error

The circumference of a circle is 5 pi cm. what is the area of the circle?

Which graph represents the linear function below? y-4= (4/3)(x-2)

Which best describes a central bank's primary goals? limiting inflation and reducing unemployment reducing unemployment and maintaining cash flow controlling stagflation and reducing unemployment managing credit and ensuring the money supply's liquidity