Given a point C in the plane and a number r > 0, the circular region (or disk with center C and radius r is the set of all points in the plane whose distance from the point C is less than or equal to r The boundary of a disk is a circle. The area of a circle refers to the area of the disk defined by the circle.

what i would say the best answer is a. 40.5

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

this is a good question! i’ll do some research and what i find, i’ll contact you asap when i have something! ✊