We need to find out what percentage $912 is of $15 200. The answer is 6%, if I'm understanding the question correctly.
The complete question is: Henry knows that the circumference of a circle is
18π inches. What is the area of the circle?
Solution:Circumference (C) of the circle can be written as:

Using this value of radius, we can find the Area(A) of the circle.
Therefore, area of the circle having a circumference of 18π inches will be 81π inches²
Hi!
1.)
a:A u B=

(The same elements are written once.)
b:A u C

c:B u C

Note:I used dots to mean commas .
Good work!