2 How long will it take for $2500 to accumulate to $4000 if it is invested at an interest rate of 6.5%/a, compounded annually? A wound, initially with an area of 80 cm, heals according to the formula A(t) = 80(10-0.0236), where A() is the area of the wound in square centimetres after t days of healing. In how many days will 75% of the wound be healed