What is the inverse of the function f(x)=\sqrt[3]{7x-21}-3f(x)= 3 7x−21 −3f, (, x, ), equals, root, start index, 3, end index, square root of, 7, x, minus, 21, end square root, minus, 3 ?

given the equation is written in text so the signs and operators are weird, i don't understand the question but an inverse of any function can be found by switching f(x) or y with x.

For example if f(x) = 3x, then the inverse is x = 3y or y=x/3

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)