I'm not sure you are asking the right question? it tells you what the radius is right there. What is the question asking
In mathematics, 'is' would be the equal sign. And 'of' would be the multiplcation sign. The missing number would be any variable.
56 is 28% of a number would be translated algebraically to:

Solving for x, we get:

Divide 28 on both sides

Multiply 100 on both sides
56 is 28% of 200
Answer:
π = 3.142. π (pi) is the ratio of the diameter to the circumference of a circle. ...
144 = 12" x 12" = the number of square inches in 1 square foot. The math is easier if you measure everything in inches and divide the final answer by 144 to find the number of square feet.
No they are eaqure to each other.
20.50 * 0.8 = $16.40
16.40 * 0.4 = $6.56
Final selling price = $6.56