Problem: if the area of a circle decreases by 30 % , then the radius of a circle decreases by
Rationale: "if area of a circle decreased by x % then the radius of a circle decreases by ( 100 − 10 √ 100 − x ) % = ( 100 − 10 √ 100 − 30 ) % = ( 100 − 10 √ 70 ) % = 100 - 84 = 16 % answer b"
annotated_formula: multiply(subtract(const_1, sqrt(divide(subtract(const_100, 30), const_100))), const_100)