Which statement supports the main ideas of the law of conservation of mass?

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Step-by-step explanation:

Area of the shaded section = θ/360*πr²

Area = 15π m²

θ = 360° - 310° = 50°

r = ??

If in the values into the equation and solve for r

15π = 50/360 × π × r²

Multiply both sides by 36

Divide both sides by 5π