# math

posted by
**susan**
.

Rewrite the following using mathematical symbols:

a. Q is equal to the set whose elements are a, b, and c.

b. The set containing 1 and 3 only is a proper subset of the set of natural numbers.

c. The set containing 1 and 3 only is not a subset of {1,4,6,7}

d. The empty set does not contain 0 as an element.