What exactly are you asking?
What’s the question?
1/3 because reciprocal is the opposite
Answer:
area of a circle πr^2
r = 10/2 r = 5
π5^2 = 78.5
area of the square length X width
7 x 7 = 49
78.5 - 49 = 29.5
shaded region = 29.5 square cm
80*.65=52
15%(80)=12
40 more prefer math over science