Doing 1. Determine the function described and then use it to answer the question.

a) A container holds 150 mL of a solution that is 20 mL acid. If n mL of a solution is 60% acid is added, the

20+0.6n

function C(n)

gives the concentration, C, as a function of the number of mL added, n. Express n as

150+n

a function of C.

b) Determine the number of mL that need to be added to have a solution that is 50% acid.