Can someone please help me??

Find the measure of central angle YZU

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

What is the difference between the predicted value and the actual value

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