Which formula is the correct way to calculate the age of a rock? A. number of half-life x length of each half life
B. number of half-life + length of each half-life
C. number of half-life - length of each half life
D. number of each half-life / length of each half -life

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

it's c (engineer's do their work with mechanical stuff not on any living being)