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.
1 On average, the average pool resurfacing job is going to cost anywhere from $4 to as much as $9 per square foot. 2  The price of resurfacing would also depend on the type of cement, upgraded plaster, stone or pebbles that you will use, as they may be more expensive than the usual plaster. The resealing of the surface can vary from the weather you have, as this will affect your poolâs surface. 2  If you want an easier way to clean your poolâs surface, then you need to purchase a high-quality sealer, which costs $20 to $80 per gallon.