A tumor is injected with 2.5 grams of Iodine, which has a decay rate of 1.65 % per day. a. To the nearest day, how long will it take for half of the Iodine to decay? days b. If we start with 123,456,789 grams of Iodine, to the nearest day, how long will it take for half of the Iodine to decay? days c. If we start with 0.00000000123456789 grams of Iodine, to the nearest day, how long will it take for half of the Iodine to decay? days