The normal healing of wounds can be modeled by the exponential function. If represents original area of wound and if A equals area of wound, then formula
A=Aoe-0.35n
explains area of the wound after n days following injury when no infection is present to retard healing. Assume that wound initially had the area of 100 square millimeters.
(a)If healing is taking place, after how many days will wound be one-half its original size?
(b)How long before wound is 10% of its original size?