9th grade
posted by Ross .
Name the set(s) of numbers to which 1.68 belongs.
a. rational numbers
b. natural numbers, whole numbers, integers, rational numbers
c. rational numbers, irrational numbers
d. none of the above
my answer a)rational numbers

The School Subject is NOT 9th Grade. Clearly state the school subject so that the right volonteer teacher reads it.
Sra 
Dina, Ross, Denis, Den, or whoever 
There is no need to keep switching names when you post questions. Please stop. All you do is create confusion.
Choose one name and stick with it. 
RATIONAL

It is indeed Rational good job!