The isotope Sr-85 is used in bone scans. It has a half-life of 64.9 days. If you start with a 10-mg Sample, how much would be remaining after 50 days? Round to the nearest hundredth.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years