It would help if you proofread your questions before you posted them.
You give us formulas, but no values.
if the Quadratic Formula: x = −b ± √b²-4ac/2a.
and the Distance Formula: d=√(x₁ – x₂)² + (y₁ – y₂)²
then what is the area of your marbles?
a. 69
b. 69.9
c. 420.69
d. 34535
2 answers
A = 4πnr^2