The rock will be 28 after two half lives
The quantity of water in the water table can change rapidly depending on the rate of extraction. As the level of water decreases in the aquifer, there is less available water to be pumped. If the rate of potential groundwater recharge is less than the rate of extraction, the water table will be too low for access.
Answer:
Sample 4.
Explanation:
Oxygen is very important for life, so this should be present.
