126 because if you multiple 21 and 6 it’s gives you 126
Answer:
its d
Step-by-step explanation:
Answer:
8^-2a^7 = a^7/8^2 = a^7/64
Step-by-step explanation:
ANSWER

EXPLANATION
The outermost square tile has side length,

The area of a square is given by;

We substitite the given expression for the side length into the formula to obtain,


We expand using the distributive property to obtain;

This gives us:


The last choice is correct.