The synthetic radioisotope technetium-99, which decays by beta emission, is the most widely used isotope in nuclear medicine. The following data were collected on a sample of 99Tc:
Disintegrations per Minute Time (h)
180........................................................0
130......................................................2.5
104......................................................5.0
77........................................................7.5
59......................................................10.0
46......................................................12.5
24......................................................17.5
Using these data, make an appropriate graph and curve fit to determine the half-life.