The formula of a volume of a sphere with radius R:
[tex]V=\dfrac{4}{3}\pi R^3[/tex]
We have R = 7cm. Substitute:
[tex]V=\dfrac{4}{3}\pi\cdot7^3=\dfrac{4}{3}\pi\cdot343=\dfrac{1372\pi}{3}\ cm^3[/tex]
[tex]\dfrac{1372\pi}{3}\approx1436.0\ cm^3[/tex]
Answer: V = 1436.0 cm³
