A. Use the roster method to write the given set. You may need to consult a reference, such as the Internet or an encyclopedia. (Enter your answers as a comma-separated list. Enter EMPTY for the empty set.) The set of whole numbers less than 9. B. Use set-builder notation to write the following set.
{1, 4, 9, 16, 25, 36, 49, 64, 81}
{x | x is a positive square number less than or equal to 81}
{x | x is a positive square number less than or equal to 100}
{x | x is a positive number less than or equal to 9}
{x | x is a positive square number greater than or equal to 1}
none of these
C, State whether the given pair of sets are equal, equivalent, both, or neither.
{1, 2, 9}; {I, II, IX}
A. equal
B. equivalent
C. both
D. neither