Identify the most specific set to which each of the following numbers belongs:
sqrt(144) -
0.121212... -
sqrt(47) -
0 -
-9 -
(only use each word once)
word bank:
Natural number
irrational number
whole number
integer
rational number
sqrt(144) - whole number
0.121212... - rational number
sqrt(47) - irrational number
0 - integer
-9 - integer