The correct answer is 9πr^2
I know because I just took the quiz.
Answer:
Pollutants are responsible for creating an imbalance of the substances that leads to a negative impact in a particular part of the earth like air, water, soil, noise, and more.
Primary pollutants are the pollutants that are directly generated from their sources such as activities by humans like air and water pollutants from the car, from ships, that affects the organs of humans like lungs, eyes, stomach and reduces our immune system and our life. Indirectly affect us. In the environment, they increase toxic substances in high amounts that cause various negative impacts.
Secondary pollutants form due to the reacting of primary pollutants and natural resources. Acid rain is an example of the secondary pollutant result which is formed due to dissolved sulphuric acid in rainwater. It also affects the skin of humans and affects the environment by increasing acidity to soil and water.
Answer:
There are 11 time zones
Explanation:
There are 9 time zones by law in the USA and it’s dependencies, however, adding the time zones of 2 uninhabited us territories gives us 11 time zones in total.
I think the answer is c I hope this helps
