No file answers plz and thank you.

1/4 because there is 4 grades.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

answer: what do you mean

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x