 It's very hard on myself, man. I ain't lying. That's good, though. That's what you need to be. I mean, you want to learn this stuff, you know? That's what it's all about, and that's what we're doing here. I was too upset yesterday. I couldn't get that problem. The moles? The moles, man. And it was like, I don't know. Did you look at it later? No, I just... We'll do that one later, okay? Yeah. Let's do this one for right now. Okay, so the height of a 12-year-old boy is 4 feet 9 inches. Record this height in centimeters, okay? So this is kind of a tricky little question, okay? But the thing is, is it gives you this conversion factor 1 inch to 2.54 centimeters. So let's just write that down first. And the height of a 12-year-old boy, that part doesn't matter at all, okay? Because it just says, record this height in centimeters. So all you're worried about is the height and changing it from feet inches to centimeters, okay? So the height, it says, is 4 feet 9 inches, okay? That's how we say it, you know? Yeah. When we measure it, though, it's like, you know, one extended measuring tape that you're using. You're not using like a 4-foot and then a 9-inch measuring tape. But that's the way you kind of want to break it down into these two kind of components, you know? So let's do that, okay? So what we're going to do is break it kind of apart here. We're going to figure out what is 4 feet in centimeters and then we're going to figure out what is 9 inches in centimeters. Okay, that's the way to do this. Okay, well, 9 inches is easier. So let's do that part first, okay? So once we figure out what 9 inches is, right, you knocked off 9 inches, right, of your height and then all of this is 4 feet, right? Yeah. And then we add those two together, okay? Okay. So we'll just do H1 equals, and it does only give you one significant figure, but since these answers are in 2 and 3, we'll just do it to one of those, even though it kind of makes me ill just thinking about it. Anyways, 9 inches. How many stick figs are we using? Well, let's just do it to 3. 3, okay. Yeah, let's just pretend each of these has 3 stick figs on it, okay, because I think the answer might be in 3 stick figs. So if we do that, either way, we're just going to keep as many stick figs as we've got from the answer for right now, okay? So if you think about what we're doing, we're saying H total equals H1 plus H2, right? H1 is 9 inches, H2 is going to be 4 feet, okay? Oh, okay, H1 and H2. Yeah, do you see what I'm doing? Kind of doing this total, totaling it? Yeah. So you know this conversion factor isn't given to you in the problem, but you know that 1 foot is 12 inches. 12 inches, yeah. The 1 inch equals 2.5 inches. So if you've got this conversion factor, 1 foot, 12 inches, right? That's going to cancel out your feet and give you inches, right? Then we're going to take that, like you said, 1 inch, 2.54 centimeters, cancel, cancel, and then let's multiply it out. 4 times 12 times 2.54. And like I said, just keep all of your significant figures for right now. Okay, so we got this 121.92, then we add that to 22.86. Yeah, and so what are we doing? We're doing HT equals H1 plus H2, right? So 22.86 centimeters plus 121.92 centimeters. When we do that, 144.78 centimeters. And well, I'll bet you they want you to do this in this three significant figures because the answer is D, which is in three significant figures, which is rounded here. 145. 145, so I guess we probably should have started the problem saying, if I would have known, you know, the three significant figures, yeah. Does that make sense? Yeah. So you always, whenever you see this kind of thing, you always want to break it up into like this. Okay. I was making it a lot easier, you know. It makes sense when you do it that way though. It does, yeah. So just as soon as you split it up, I was on to it. Yeah, sure. I was on to it because I can't take the feet, get that out the way, take the inches, get it out the way. And that's what you want to do is just baby step, baby step, baby step. But the thing is, is somebody needed to teach you this split up, you know. But you know that inherently, you know, because if I'm four feet tall, if you cut me in half, that's two feet and two feet. And I could put those two together and make four feet again. That's essentially what we're doing here. If you're four feet nine inches, I could cut nine inches off of you, measure that, take that four feet, measure that, put those back together, you know, and that's how tall you are. Does that make sense? Okay, cool.