An ellipse has 2 foci. They are the points of the major axis which are at distance $a$ from the intersection between the minor axis and the ellipse. The distance between the foci and the center is then called the linear eccentricity $f$.
Find Your Surgeon. Find Your Surgeon. The average cost of laser skin resurfacing is $2,222 for ablative and $1,113 for non-ablative, according to ASPS 2012 statistics. The cost of laser skin resurfacing may vary, and the aforementioned fees are the national average surgeon/physician fee only.ind Your Surgeon. The average cost of laser skin resurfacing is $2,222 for ablative and $1,113 for non-ablative, according to ASPS 2012 statistics.
This does not include replacing waterline tiles or the pool deck. Resurfacing with a pebble or quartz aggregate finish (like PebbleTec or Diamond Brite can cost $3,500-$8,500 for a rough finish or about $5,000-$10,000 for a polished finish, depending on the style and color.