Answer:
Maisie is 22680 hours old.
Step-by-step explanation:
Given is: Maisie is exactly 135 weeks old.
First, lets calculate the number of hours in 1 week.
Number of hours in 1 day = 24
Number of hours in 7 days or 1 week = [tex]24\times7=168[/tex] hours
Now, number of hours in 135 weeks = [tex]135\times168=22680[/tex] hours
Therefore, Maisie is 22680 hours old.