ABC Phone company charges $19 per month plus 9 c per minute of phone calls. XYZ phone company charges $13 per month plus 12 c per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal

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