00:01
So we have some type of goo going on here, and we originally have 244 grams.
00:05
So what was provided is that at 255 minutes, the sample was 30 .5 grams.
00:10
So we're trying to figure out what is the half -life or what is this h here.
00:13
So what we're going to do is put that 30 .5 in for a, like this, equals 244, then the one -half.
00:22
And it looks like we're going to be doing time in minutes.
00:25
So the numerator of this is going to be the 255, and our unknown here is going to be h.
00:30
So the first thing we're going to do is actually divide.
00:33
So 30 .5 divided by 244.
00:36
And i get 0 .125 is equal to one half to the 255 over h.
00:43
So i'm kind of stuck here.
00:44
So i'm going to convert to a log.
00:46
So it's going to become log base 1 half.
00:50
And then the 0 .125 is equal to and then 255 over h.
00:56
So to figure out the half life, i'm going to move the age over and divide.
01:00
By the log...