# Calc

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You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Show the work necessary to calculate the cheapest method of preparing the 17% salt solution if the 5% salt solution costs \$28 per liter, the 28% solution costs \$38 per liter, and the 40% solution costs \$50 per liter. Be sure to explain in paragraph form why you have selected the amounts of each and the total cost of your selection.

• Calc -

Hint:
The costs are linear, so you can either prepare it with 5%+28% or 5%+40%.
Calculate the cost of each and use the less expensive option.
I have the impression that it costs less by mixing 5% with 40%.

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