You Marie Curie assistant and your task is to study a piece of material and 2 points track its decay. You are starting with a 10kg lump of an unknown material. After 5 days you measure it again and only have 7.5kg remaining of the original material, the other 2.5kg is now something else. Can you determine the half life? If so, what is the half life of this material? O 5 days O O 10 days © 15 days 20 days​

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.