Multiple choice Find the volume of a sphere of radius $2.1\;cm$. $34.8\;cm^3$ $35.8\;cm^3$ $38.8\;cm^3$ $36.8\;cm^3$ Reveal answer Fill a bubble to check yourself C Correct answer Explanation The volume of a sphere is (4/3) * pi * r^3. With r = 2.1, V = (4/3) * 3.14159 * (2.1)^3 = (4/3) * 3.14159 * 9.261 = 38.792 cm^3, which rounds to 38.8 cm^3.