Question

there are 500g of cobalt to 60 that has a half life of 5years ,how many grams of cobalt are remained after 15years

Three half lives

500 * 1/2 * 1/2 * 1/2

= 500/8 grams

Related Questions

the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10... how much cobalt-60 remains 15 years after it is initially made?cobalt-60 has half life 5.27 Cobalt‑60 is subject to radioactive decay, and each year the amount present is reduced by 12.3%.... The amount of a radioactive substance remaining after t years is given by the function , where m is...