Question

A pharmacy mixes different concentrations of saline solutions for its customers. The pharmacy has a supply of two​ concentrations, 0.4% and 4%. The function y=((100)(0.4)+x(0.004))/(100+x) gives the concentration of the saline solution after adding x milliliters of the 0..4% solution to 100 milliliters of the 4% solution. How many milliliters of the 0.4% solution must be added to the 4% solution to get a 0.85% solution?

Please answer soon it's timed

Answer 1

8700

Explanation:

(100)(0.4) + (x)(0.004) = (100+x)(0.0085)

40 + 0.004x = 0.85 + 0.0085x

0.0045x = 39.15

x = 8700