Eric jogged 3 1/4 miles on Monday, 5 5/8 miles on Tuesday, and 8 miles on Wednesday. Supposed he continues the pattern for the remainder of the week. How far will Eric jog on Friday?

5.625 - 3.25 = 2.375
8-5.625 = 2.375
he jogs 2 3/8 miles per day
so Thursday he jogged 8 +2 3/8 = 10 3/8
Friday 10 3/8 + 2 3/8 = 12 3/4 miles