1. The fire covered 300 [tex] mi^{2} [/tex] 3 days ago
2. Today it covers twice the amount of 3 days ago so 2*300=600 ([tex] mi^{2} [/tex] )
3. After 3 days from today, it will have covered 2*2*300=1200
4. After 3*2=6 days from today, 2*2*2*300=2400
5. After 3*3=9 days from today, 2*2*2*2*300=4800
6. After 3*4=12 days from today, it will have covered 2*2*2*2*2*300=9600 ([tex] mi^{2} [/tex] )
7. We can gereralize: After 3*n days from today, it will have covered [tex] 2^{n+1} *300[/tex] ([tex] mi^{2} [/tex] )
