If I understand this question correctly, Diego will pay $1.12 because the 9 rounds the 1 up to a 2.
9.23 is less than 9.32 because .32 is more than .23
You find the squares it around, say 23, well its between 25 and 16 the pefect square roots of 5 and 4 and 23 is closer to 25 so it would be around 5
21 not sure but you can do it
