Answer: The correct expression is (A) [tex]\dfrac{4}{3}\pi(7)^3.[/tex]
Step-by-step explanation: We are given to select the correct expression that gives the volume of a sphere with radius 7 units.
We know that
the VOLUME of a sphere with radius 'r' units is given by
[tex]V=\dfrac{4}{3}\pi r^3.[/tex]
Here, the radius of the given sphere is
r = 7 units.
Therefore, the volume of the sphere will be
[tex]V=\dfrac{4}{3}\pi r^3\\\\\\\Rightarrow V=\dfrac{4}{3}\pi (7)^3.[/tex]
Thus, the required expression is [tex]\dfrac{4}{3}\pi(7)^3.[/tex]
Option (A) is correct.
