00:01
So here's a pretty good application problem.
00:03
It has to do with understanding medication dosages.
00:08
You know of a relative who is addicted to painkillers, and due to the relative's history, 2 .3 grams of tylenol per day is dangerous.
00:17
He takes the 200 milligram scored tylenol tablets every six hours, and the question is, for each six hour period, how many tablets can this relative take without going overboard without being dangerous.
00:33
So there's some things that we need to consider maybe some unit conversions.
00:37
First of all, 2 .3 grams versus everything else in milligrams.
00:43
Perhaps we should do everything in milligrams.
00:45
So we're using the same unit.
00:47
So, okay, let me write this down.
00:49
2 .3 grams.
00:52
And we would like to know what is that in milligrams? well, there's 1 ,000 milligrams in a gram.
00:59
So if i times this number by a thousand, i'm going to have 2 ,300 milligrams.
01:09
So this is 2 ,300 milligrams per day is dangerous.
01:15
So we need to make sure that this relative is not taking this amount.
01:22
It's taking lower than this amount.
01:25
Okay.
01:25
The other thing is that this relative is taking medication every six hours.
01:30
So how many times a day is this person taking medication? well, there's 24 hours in a day.
01:38
So if i divide each, or if i divide 24 by 6, i'm going to have four.
01:46
So there's four times a day to take medicine.
01:54
Okay, so if we know how much is the max per day, and there's like a max of four times of taking medicine per day, maybe we can do a little bit more division...