From the 3 options listed, both

in and

in could be measures found using a ruler with eighth inches marked, because those decimals can be written in terms of eighth fractions.

The other option,

in, is not a possibility because 0.1 cannot be written as a fraction of 8 that is marked on the ruler.
Answer:
Hope this helps
Step-by-step explanation:
What do you meen they are numbers
simplify to 1 hour which will be 6 minutes in 1 hour
in 3 hours it will be 18 minutes