Question

You bike 2 miles the first day of your​ training, 2.3 miles the second​ day, 2.9 miles the third​ day, and 4.1 miles the fourth day. If you continue this​ pattern, how many miles do you bike the seventh​ day?

Answer 1

2 miles —+0.3–> 2.3 miles
2.3 —+0.6–> 2.9 miles
2.9 —+1.2–> 4.1 miles
Every time it multiples by 2, so
5th day = 4.1 + 2.4 = 6.5 miles
6th day = 6.5 + 4.8 = 11.3 miles
—> 7th day = 11.3 + 9.6 = 20.9 miles

Answer: 20.9 miles - 7th day