3.14159628... (pi) is irrational as far as we know. In mathematics that means it can't be expressed as a ratio of two whole numbers, in other words, a fraction; although 22/7 is close.

0/0 is an undefined operation. It has no answer.

0 to the 0 power = 1 by definiton. Since any number to the zero power is the result of dividing it by itself, 0 to the zero power would be 0/0 which is undefined. So instead, in this one instance only, 0 to the 0 power is DEFINED to be 1.