Answer:
x^2 * b^2
Explanation:
Like 3 squared times 2 squared is 3*3*2*2. Similarly the expression given in the question is equal to x*x*b*b. And that explains what is mentioned in question.
23 bits would leave room for 512 node numbers.
1. ughhhh not entirely sure but B, 2. again not entirely sure should be B as well and finally 3.is D remember these are not always the answer just most likely what one person thinks