The product of a nonzero rational number and an irrational number. a) is a rational number b) is underlined c) is an irrational number d) cannot be determined without more information

The product of a nonzero rational number and an irrational number is:

             C) is an irrational number

We know that:

       For example--   is a irrational number.

and which is a rational number.

          Hence, the answer is:

            Option: C

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.