The half-life of halfnium-156 is 0.025 seconds. What was the original amount of the substance if after 0.1 seconds 3.125 gram remains? (A: 25 g)

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping