Answer:
84π sq. units
Step-by-step explanation:
radius of little orange circles = 2
There is a total of 3 little orange circles (1 + 1 + 1/2 + 1/2).
Total area of 3 little orange circles = 3*π*2^2 = 12π
radius of 4 medium white circles = 3
Total of area of 4 medium white circles = 4*π*3^2 = 36π
radius of middle white circle = 6
Area of middle white circle = π*6^2 = 36π
Radius of the big circle = 12
Area of the big circle = π*12^2 = 144π
Area of orange = area of big circle - area of middle white circle - area of 4 medium white circles + area of 3 little orange circles = 144π - 36π - 36π + 12π = 84π
She will need 8 more barbies, to reach a total of 12.
Hope this helps!
Answer:
x = -4
Step-by-step explanation:
To find x when f(x) = 2x + 7 and f(x) = -1, we must make these equations equal to eachother. This is because they are both equal to f(x). We can then use algebra to solve for x.
2x + 7 = -1
2x = -8
x = -4