To find the total cost of the paint, we first need to find the volume of the paint she purchased. We assume that the bucket is a cylinder so the volume of a cylinder is calculated by the expression:
Volume = πr²h
Volume = 3.14 (9 in)²(9.5 in)
Volume = 2416.23 in³
Therefore, the cost would be,
Cost = $0.09/in³ x 2416.23 in³ = $217.5