Respuesta :
Cooper needs a total of 70.4 mL of milk and butter for his recipe.
The recipe calls for 30.6 mL of butter.
So the rest of it should be milk.
How much? Total - Butter = Milk
Hence we have,
[tex]70.4-30.6=39.8[/tex]
So, Cooper needs [tex]m=39.8[/tex] mL of milk.
ANSWER: m = 39.8 mL (milk)