Perimeter is equal to 90 in.
Area is approximately equal to 389.71 in.

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:
The unknown number would be 11
738 + 164 = 902
902 / 82 = 11
Ans: 11
34 x 17 = 28 +210+40 + 300=578