Answer :
Final answer:
The ratio expressed as a unit rate is a) $0.49 per pound as it specifies a cost for every single pound, meaning the denominator is 1.
Explanation:
A unit rate is a rate in which the second number (the denominator) is 1. Using this definition, let's evaluate the options provided:
- a) $0.49 per pound - this is a unit rate because you are paying $0.49 for every single pound.
- b) 1 page per 1.2 minutes - this is not a unit rate because the time is not exactly 1 minute, but rather 1.2 minutes.
- c) 16 inches per 16 seconds - while it seems like a rate of 1 when simplified, it is not initially presented as per 1 second, so it is not a unit rate in its given form.
- d) 67 miles per 60 minutes - this is similar to one above, it could be simplified to a rate over 1 hour, but as presented it is not a unit rate.
Therefore, the ratio expressed as a unit rate is a) $0.49 per pound.
