SOLUTION: A pharmacist wishes to mix a solution that is %8 Minoxidil. She has on hand 90 ml of a 1% solution and wishes to add some 10% solution to obtain the desired 8% solution. How much 1

Question 493815: A pharmacist wishes to mix a solution that is %8 Minoxidil. She has on hand 90 ml of a 1% solution and wishes to add some 10% solution to obtain the desired 8% solution. How much 10% 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 %8 Minoxidil. She has on hand 90 ml of a 1% solution and wishes to add some 10% solution to obtain the desired 8% solution. How much 10% solution should she add?
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Equation:
mino + mino = mino
0.01*90 + 0.10(x) = 0.08(90+x)
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Multiply thru by 100 to get:
1*90 + 10x = 8*90 + 8x
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2x = 7*90
x = 7*45 = 315 ml (amt of 10% solution needed)
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Cheers,
Stan H.
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