How do I calculate the volume of a sphere if i know the diameter

d= 7mm

The formula for learning the volume of a sphere is:

4/3pi(r^3)

r=radius= half the diameter = d/2
Pi is approximately 3.14

So, 4/3*(3.14)*(3.5*3.5*3.5) = answer_____mm^3

V=(4/3)pi*r^3 r=1/2 d so V=(4/3)pi*r^3 equals V=(4/3)pi*[(d/2)^3
]

V=4/3πr³ which would be V=4/3π(7)³

V=(4/3)*pi*r^3
r=d/2
For d=7mm, V=179.594