SOLUTION: You receive the following prescription order: Humulin R 33 units/1L Using a 10mL vial with a concentration of 100units/mL, how many mL will you need to add to a 1000ml bag? Sele

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Question 1199186: You receive the following prescription order:
Humulin R 33 units/1L
Using a 10mL vial with a concentration of 100units/mL, how many mL will you need to add to a 1000ml bag?
Select one:
Oa. 0.33mLs
Ob. 33mLs
Oc. 3.3mLs
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
your concentration available is 33 units to 1 liter.
1 liter = 1000 milliliters.
therefore, the order is for 33 units to 1000 milliliters.

you have a 10 milliliter vial with a concentration of 100 units per milliliter.

you want to add 33 units to 1000 milliliters.
since your vial contains 100 units to 1 milliliter, you need to add .33 milliliters from the vial to the bag.

your ratio is 100/1 = 33 / x
x is the number of milliliters you have to add.
cross multiply to get:
100 * x = 1 * 33
solve for x to get:
x = 33/100 = .33 milliliters

you need to add .33 milliliters from the vial to add 33 units to the bag..
that would be selection Oa.