Answer:
Explanation: To find the volume of a sphere, first start with the formula for the volume of a sphere.
Volume =
The sphere has a radius of 9 units, so we can plug 9 into the formula.
Now, let's simplify the exponent. Remember that 9³ is equal to 9 units x 9 units x 9 units or 729 units³.
Notice that we can cross cancel 3 in and 729 to 1 and 243.