In an office building 120 offices are currently being rented this represents 80% of the total units how many offices are there in the building

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

Ithink i know it but i want to be sure so can you me out ?

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =