The table shown below gives the approximate number of pieces of mail handled by the United States Postal Service for different years. How many more pieces of mail were handled by the United States Postal Service in \[1995\] than in \[1965\]? Express your answer in scientific notation. YearApproximate number of pieces of mail handled \[1950\] \[4.5 \cdot 10^{10}\] \[1965\] \[7.2 \cdot 10^{10}\] \[1980\] \[1.0 \cdot 10^{11}\] \[1995\] \[1.8 \cdot 10^{11}\] \[2010\] \[1.7 \cdot 10^{11}\]