E The radioactive substance uranium-240 has a half-life of 14 hours. The amount A (t) of a sample of uranium-240 remaining (in grams) after t hours is given by the following exponential function. 1 14 A (t) = 4700 ( Find the initial amount in the sample and the amount remaining after 50 hours. Round your answers to the nearest gram as necessary. Initial amount: grams Amount after 50 hours: grams Х 6