Answer:
a. [tex]0[/tex]
d. [tex]\frac{1}{π}[/tex]
Step-by-step explanation:
Multiplying [tex]\frac{1}{π}[/tex]by its multiplicative inverse [π] will give you 1, and anything multiplied by 0 is 0.
According to the rules, both 0 and 1 are integers, and state that ALL integers are considered rational numbers, so with that being said, you have your answers.
I am joyous to assist you anytime.
