You need 30% alcohol solution. On hand, you need a 390 mL of a 10% alcohol mixture. You also have 60% alcohol mixture. How much of the 60% percent mixture will you need to add to obtain the desired solution? You will need mL of the 60% solution.

i believe the answer is 68cm

step-by-step explanation:

i just took 34 x 2 because the space between v and y is the same as y to k.

go on the tube you might find some information there

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72