Answer:
114cm² (rounded off to 3 significant figures)
Step-by-step explanation:
formula for area of circle: πr² (where r is the radius of the circle)
radius = diameter ÷ 2
 = 12 ÷ 2
 = 6cm
area = π(6)²
 = 36π
 = 113.973 (6s.f.)
 = 114 (3s.f.)
hence, the mold's area is 114cm²