Answer:
read your username :)
Step-by-step explanation:
A. 485 is %3 of 500, but the deviation sets it slightly lower than that

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:
First you chang top fractions into decimal add and divide that by 4 which is equal to 0.375 hope it helps.
No because u have to have 9 or 9 or 8 and 8