The half-life of the radioactive element Radium-226 is 1590 years. This means that after 1590 years only half of the original radioactive material will have disintegrated. Because the

rate of decay is proportional to the amount of material present, the function that describes this decay will be exponential.

If the initial amount of Radium-226 present was 100g, write an exponential function, call itR(t), that describes thedecayovertyears, at adecay rate of k..