In 1980,the us produced 18.4 billion(10to the power of 9)pounds of phosphoric acid to be used in the manufacture of fertilizer. the average cost of the acid is 318$/ton.(1 ton =2000 lb)what was the total value of the phosphoric acid produced?

18.4 * 10^9 lbs = (18.4 * 10^9)/2000 tons  

Cost = ((18.4 * 10^9)/2000 ) * 318  

Cost = $ 2925600000

2'925.600'000.000‬ $ approximately 2,93 billion $

Explanation:

In order to get the total cost of the Phosphoric Acid produced, it's necessary to convert the Phosphoric Acid pounds into Tons using the given conversion and knowing that :

and knowing a Ton cost 318$ we can multiply by 318$ and get the result:

This is approximately 2,93 billion $.

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.