How many sig figs does each number contain? a) 100. min b) 17.3 x 10 3 mL c) 10 apples

So here, let's take a look at this practice question. It says, how many sig figs does each number contain? Alright. So if we take a look at the first one, it has a decimal point right there. So that means we have to count from left to right. We start counting once we get to our first non zero number, which is this one right here, and we count all the way into the end. So 1, 2, 3. So we have 3 sig figs for this first one. For the next one, we have it in scientific notation. So again with scientific notation, just pay attention to the coefficient portion. So we're gonna say here, we're going to say here our first non zero number is this 1. So 1, 2, 3. This also has 3 sig figs. And then finally c, we have 10 apples. Now, this is something we can count and know with exact certainty. Okay? Because it's something we can count with exact certainty, that means it's an exact number, and because it's an exact number, it would have an infinite infinite number of significant figures. So, again, if you're able to count it, a 125 students in a lecture room, a dozen eggs is 12 eggs, Ten apples. These are exact numbers that we can know with certainty. They're all because they're all exact numbers, they all have an infinite number of significant figures. Alright. Now that we've done this practice question, let's continue on with our talks on significant figures.