Astudent is trying to calculate the density of a ball. she already knows the mass, but she needs to determine the volume as well. which of the following formulas can be used to calculate the volume of the ball? v equals four-thirds times pi times r cubed v equals one-third times pi times r squared times h v = s3 v = πr2h

Let's examine the given choices:
V = (4/3)*pi*(r)^3 is the rule to calculate the volume of the sphere
V = (1/3)*pi*(r)^2*h is the rule to calculate the volume of the cone
V = s^3 is the rule to calculate volume of the cube
V = pi*(r)^2*h is the rule to calculate volume of the cylinder

Now, the ball can be treated as a perfect sphere, therefore, to calculate its volume we will use the rule of the volume of sphere.

Based on this, the correct choice is:
V = (4/3)*pi*(r)^3