Answer:
12288
Step-by-step explanation:
its a geometric sequence where each term is 4 x the term before it
so the 7th term = 3 *4^6 = 12288
A square's area is the square of the sides
square area= side²
side=

side=

side=

OR we can divide it
|_

x²|_

x⁴|_

4x⁴|_