âWe found that the area, perimeter, length, and width of the lamina were highly correlated, suggesting the existence of a common genetic control.â âFinally, if the rope is short enough (less than half the perimeter of the barn), the problem simplifies immensely.â âYou calculate the perimeter by multiplying the diameter by pi.â
You can expect to be paid anywhere from $20 to $50 per donation. The range in compensation is related to the volume of plasma you're able to donate. The FDA sets the guidelines and the ranges are 110-149 pounds, 150-174 pounds, and 175-400 pounds.
Lastly, plasma donating times can vary. The number of times you may donate is also restricted, the policy at most centers is twice a week. You can donate plasma twice a week, but no more than 4 times in a 14 day period, with one day of rest in between.