The answer is A because it has 4 sides
Last week: 96x3=288
This week:204x3=612
Take this week and subtract from last week
612-288=324
So he made $324 more this week
A circle is a plane figure that has zero volume by definition. No calculation is required.
_____
The volume of a sphere is given by the formula
Fill in the value for the radius and evaluate the expression.