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Title: Pharmacy math Post by: Billkbob on May 2, 2018 How much of a 10% cream must be mixed with a 0.5% cream to prepare 4 oz. of a 3.75% cream?
Title: Re: Pharmacy math Post by: bio_man on May 2, 2018 How much of a 10% cream must be mixed with a 0.5% cream to prepare 4 oz. of a 3.75% cream? Let x and y be volumes in ounces of the different creams, and convert the percentages into decimals. 10% / 100 -> 0.10 0.5% / 100 -> 0.005 x(.10) + y(.005) = 4(0.0375) x + y = 4 This is a system of linear equations. The answer is: x = 1.36 oz of 10% y = 2.63 oz of 0.5% If you'd like to see how it's done mathematically, watch: https://www.youtube.com/watch?v=FjGeYL9QJpU Title: Re: Pharmacy math Post by: meperry1980 on Sep 19, 2019 thank you so much! after reading my text ten times seeing it worked once and i have it!!
Title: Re: Pharmacy math Post by: bio_man on Sep 19, 2019 thank you so much! after reading my text ten times seeing it worked once and i have it!! You're welcome. Anything else, just start a new topic :-) |