 Okay, so let's do a summary of our significant zero rules where they pertain to zeros, okay? So, if we look at this problem or this number, it gives us a lot of information regarding zeros and significant digits. If we see we got three different types of zeros in this number, okay? We've got these two, which are before any non-zero digit, okay? Those kind, we call leading zeros. So, it doesn't matter if they're before or after the decimal place. If they're leading, they're never significant, okay? So, then we have zeros that are in between two non-zero digits, okay? Those are called captured zeros, okay? Those are always, okay? So, the question comes when zeros are significant and not to trailing zeros. So, I'm going to write another number that also has trailing zeros, okay? So, is everybody okay with all of those being trailing zeros? Okay, notice this number has a decimal place, or decimal point in it, okay? Whenever the trailing zeros are in numbers with decimal points, they're always decimal. So, when they're without the decimal, like this one, they're never significant, okay? So, that's kind of the overview really quick. If you were to put these two numbers into scientific notation, it would really reveal the significance of the zeros, okay? So, whenever you put something into scientific notation, you only put the significant figures into that scientific notation number, okay? So, let's just do that scientific notation really quick, and then you can ask that question, okay? So, let's put them both into scientific notation, and you guys can do this on your own while I'm doing this up here. So, this one's going to be 1, 2, remember? Put the decimal after the first known zero digit, okay? So, 1, 2 to the right, that's negative, right? So, this first one's going to be 1.5010, right? Because we're going to keep all the significant zero digits times 10 to the negative 2, like that, okay? This one down here, right? What do we say about the significant digits? Yeah, those don't count, and we're not going to bring, we're only going to bring significant digits into the scientific notation, right? So, how many digits is this one going to have? One, just one. So, it's going to be 2 times 10 to the, we got to pretend there's a decimal there, and say 1, 2, okay? Does everybody understand now? So, that kind of is revealing about significant digits when you put them in the scientific notation. Do you have a question? Yes, like in the 200, what would have happened if we had a decimal at the end? So, what is any number with a decimal? With a decimal, the trailing zeros are always significant, okay? So, if we put a zero there, what would they be? Oh, 200. Would they be significant or not? Yes. They would be significant. Of the difference, okay? So, let's do that. Yeah, let's do that one really quick. Yes, it's a number with a decimal, right? So, they're always significant. The arrows are, sorry, the zeros are there and there, okay? So, let's put this into scientific notation. So, are we going to leave those zeros in there when we put it into scientific notation? We're going to keep them. Keep them.