You bike 2 miles the first day of your training, 2.4 miles the second day, 3.2 miles the third day, and 4.8 miles the fourth day. if you continue this pattern, how many miles do you bike on the seventh day?

Ok so because on the first day he rode 2 miles then on the second he rode 2.4 miles. He increased his distance by .4 miles, then on the 3rd day he rode 3.2 miles that means he just increased it by .8 then it increases by 1.6. this increase is x2 each time he goes back to ride. so doing it the long way u would get
1=2
   +.4
2=2.4
   +.8
3=3.2
   +1.6
4=4.8
   +3.2
5=8
   +6.4
6=14.4
   +12.8
7=27.2