 Okay, let's do some unit conversions and then I'll let you out of here Okay, so the first one first question we've got is how many Donuts are in 3.5 does So we've got you want to write down what the problem tells you first. So how many doesn't we've got we've got 3.5 Doesn't and we know our conversion factor right is one dozen equals 12 Donuts a lot of times you'll Say anything that's like a number of something like Five cars or something like that. You'll give it the Variable of n But anyways, so you've got your Unit conversion, so let's make a conversion factor out of it. Remember what we do We just take one and divided by the other How can we do that? Well, we can say divide both sides by 12 donuts over 12 donuts cancels out to give you one So you can multiply anything by one remember we talked about this you can multiply anything by one It's the same thing since this conversion factor is equal to one and so is the inverse of it use those to convert From dozens to donuts This is what you do in your head When you figure out if the guy at the donut store gave you the right of matter to put 12 donuts on top And one doesn't on the bottom. Why do I use this one? Instead of this one, I don't use that one because I want to cancel out my Dozens and I want to get done so Dozen over dozen Cancels out and we get donuts. The thing is Worthless or our number is worthless. So how do we figure this number out how many? Donuts are in 3.5 dozen. Well, all we do is take 3.5 Multiply by 42 and remember six things only come from the measured number not from the conversion factor So 42 donuts. Okay, we'll do a couple more of these