If the half-life of an unstable element is 5,000 years, what percentage of the parent material will
be left after 10,000 years?

M! (1). what are the inputs and the outputs for cellular respiration? (2). what is the primary source of energy for cellular respiration?

Are salt and soap nutrients or toxins for yeast? explain.

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body