Which exponential functions have been simplified correctly? check all that apply. f (x) = 5 rootindex 3 startroot 16 endroot superscript x baseline = 5 (2 rootindex 3 startroot 2 endroot) superscript x f (x) = 2.3 (8) superscript one-half x baseline = 2.3 (4) superscript x f (x) = 81 superscript startfraction x over 4 endfraction baseline = 3 superscript x f (x) = three-fourths startroot 27 endroot superscript x baseline = three-fourths (3 startroot 3 endroot) superscript x f (x) = (24) superscript one-third x baseline = 2 (rootindex 3 startroot 3 endroot) superscript x