The surface area S of a sphere of radius r is given by SO") : 4mg. Explain why. in the given context. 50') has an inverse function. Identify the correct explanation. O 50') is both increasing and decreasing on its domain. 0 50') is decreasing on its domain and therefore is onetoone. O SUP) is increasing on its domain and therefore is onetoone. O SUP) is linear and must have an inverse. O 50') is a polynomial and all polynomials are onetoone for all real numbers. Find the inverse of SUP). expressing r as a function of S. (Express numbers in exact form. Use symbolic notation and fractions where needed.) r(S) = l