By far the largest and most widespread use of americium-241 is as a component in household and industrial smoke detectors, where
a small amount is used in an ionization chamber inside the detector. The half life of americium-241 is 432.2 years. If a smoke detector is buried in a land fill, how many years are required for the original amount of americium-241 to decay to less than 1% of the original amount? Round your numerical answer to the nearest tenth of a year. 1,435.7 years
