Would the answer to this problem be 27a^9 or 27a^6 and why?

What is the circumference of a circle with an area of 50.24 cm²?

2. there are 250 students in a school auditorium. use numbers from the box to complete the table. 16, 38, 18, 45, 25, 50, 32, 60 grade number percent of all students of students fifth 24 sixth 95 seventh 20 eight 45

A. 530 ft^2 b. 500 ft^2 c. 470 ft^2 d. 450 ft^2