Element x is a radioactive isotope such that every 11 years it's mass decreases by half. Given that the initial mass of a sample of element x is 70 grams how long would it be until the mass of the sample reached 14 grams to the nearest tenth of a year?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. find the lateral area for the prism. l. a. = 0123456789