Question 1059559
Hi there,
Area = 3900 km^2
Decrease = 7.75%
100% - 7.75% = 92.25%
92.25% = 92.25/100 = 0.9225.
Area x 0.9225^15
After 15 years area = 1162.95 km^2 (2 decimal places)
Hope this helps :-)