00:01
So we're a pharmacy technician, and we need to prepare a 0 .85 gram dose of liquid antibiotic.
00:07
The medicine is supposed to be concentrated for 250 milliliters of antibiotic for every 5 milliliters of liquid.
00:14
So if we need to make this 0 .85 gram dose, how many milliliters do we need to pour in that bottle to get that same concentration? so what we need to do here is we need to set it up as a ratio.
00:26
So for every 250 milligrams, we need 5 milliliters of water.
00:37
And that's going to have to equal our 0 .85 grams, and then we don't know what we're in need for our milliliters of water.
00:47
So before we even do anything with this, we need to make sure that our units are consistent.
00:52
So we have grams here and milligrams here.
00:55
We need to convert one of these to, the same either milligrams or grams.
01:02
I'm going to go ahead and convert this 250 milligrams to grams.
01:06
So when we do that, the nice thing about the metric system, it's a base 10 system.
01:13
So i can just simply move the decimal.
01:15
So milla is going to be over here, and i just need to move the decimal one, two, three times to the base grams.
01:23
So i'm just going to take this decimal here.
01:25
One, two, three...