Which numbers are exact (and therefore have an unlimited number of significant figures)? b. 12 in = 1 ft

Video transcript

Hi everyone For this problem, we need to determine whether the number is exact or not exact and it says to note that the number of significant figures of exact numbers is unlimited. So one ton is equal to £2,000. To determine whether this is exact or not. We need to see if it communicates uncertainty. If it does communicate uncertainty, then it is not exact. But if it does not communicate any uncertainty then it is exact. Okay, so two things define exact numbers and those are counted items and defined values. So one ton is equal to £2,000. This is a defined value and because because it is a defined value, this is an exact number. Okay, it is an exact number because there is no uncertainty. That's the end of this problem. I hope this was helpful.