Every 2 years, the number of swans at Rita's pond doubles. Currently, there are 15 swans in the pond. How many swans will there be in ten years?
If currently there are 15 swans in the pond, in two years' time there will be 15*2=<<15*2=30>>30 swans.
In another two years, the number of swans in the pond will double to 2*30=<<2*30=60>>60 swans
In another two years, the number of swans in the pond will double to 2*60=<<2*60=120>>120 swans
If after 6 years there are 120 swans in the pond, in eight years times there will be 2*120=240 swans
In another two years, which is 10 years, there will be 2*240=<<2*240=480>>480 swans in the pond
#### 480