PLEASE HURRY! What is the half-life of a 12 g sample of radioisotope that decayed to 6 g in 28
years?
A. 14 years
B. 7 years
C. 56 years
D. 28 years

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Stage in which a typical star has completely stopped fusion

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.