Given:
In 1995, the USPS approximated that they handled 1.8 x 10" pieces of
mail.
In 2010, the USPS reported that they handled 1.7 x 10" pieces.
We will find the differences in the pieces of mail were handled in 1995 than in 2010

So, the answer will be:
There are 1 x 10¹⁰ more pieces of mail were handled in 1995 than in 2010.