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.
The Donation and Payment Schedule. You can donate twice per week with at least one day between donations, and seven days from your first donation of the week. If you donate on Monday and Wednesday, you can return on the following Monday to donate again. Payments vary according to your weight and the current need for plasma.