Does this mean how to write it? If so, then it is written:
X= the number
(See picture)

1) Since in the USA 8 x 10 ^9 messages are sent every month, that means that approximately 8 billion messages are sent.
2) We can Prime factorize it:
Note that on the right side we've picked only prime numbers. In this case, 2 and 5.
So we can rewrite 8 x 10^9 as prime factors.

3) Hence, the answer is:
Answer: about 1 cm
Step-by-step explanation:
25 i think, i just used an anagram server to generate it