Your answer is B. 91 2/3 pi Units Squared
I'm sorry but do you ha e a picture of a flowchart
jsut divide them
12,586,269,025 and 20,365,011,074
f51/f50=20,365,011,074/12,586,269,025= 0.6183398874989
(%)(V1)+(%)(V2-V1)=(%)(V2)
(0.70)(x)+(0.30)(600mL-x)=(0.55)(600)
(0.70x)+(180)-(0.30x)=330
(0.70-0.30)x=330-180
(0.40)x=150
x=(150)/(0.40)
x=375 mL