An arithmetic sequence with common difference of 2.
72
The mean is 83.
1.566
87
The average is 71.6
My '83 holds 12 gallons per side, I believe.
In the number 83, the digit 8 holds a place value of 8 units. This means the value of 8 in 83 is 8 units. The digit 8 is in the tens place, representing 8 tens, or 80.
119. un = (-n4 + 15n3 - 77n2 + 225n + 192)/6
My TI-83 Plus gives the following result 266=7.378697629E19
82-83 yz 100 holds 600 ml,hope that helps
81 miles following U.S. 83.