SOLUTION: A pharmacist wishes to mix a solution that is 4% minoxidil. She has on hand 70mL of a 1% solution, and she wishes to add some 6% solution to it to obtain the desired 4% solution. H

Question 696471: A pharmacist wishes to mix a solution that is 4% minoxidil. She has on hand 70mL of a 1% solution, and she wishes to add some 6% solution to it to obtain the desired 4% solution. How much 6% solution should she add?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A pharmacist wishes to mix a solution that is 4% minoxidil. She has on hand 70mL of a 1% solution, and she wishes to add some 6% solution to it to obtain the desired 4% solution. How much 6% solution should she add?
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Equation:
mini + mini = mini
0.01*70 + 0.06x = 0.04(70+x)
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1*70 + 6x = 4*70 + 4x
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2x = 3*70
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x = 3*35
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x = 105 mL (amt. of 6% solution needed)
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Cheers,
Stan H.
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