SOLUTION: How much of a cream base must be mixed with 20g of 0.5% dexamethasone and 75g of 0.025% of dexamethasone and 30g of 0.05% dexamethasone to make 0.02% of dexamethasone cream.

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Question 808065: How much of a cream base must be mixed with 20g of 0.5% dexamethasone and 75g of 0.025% of dexamethasone and 30g of 0.05% dexamethasone to make 0.02% of dexamethasone cream.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
20g of 0.5% dexamethasone and 75g of 0.025% of dexamethasone and 30g of 0.05% dexamethasone to make 0.02%
.005*20+.00025^75+.0005^30=.0002(20+75+30+x)
x = 543.75