The inverse of a trigonometric function f may be indicated using the inverse function notation f-1 or with the prefix “are” (e-g, sin -1 x= arcsin x)

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint