Answer: Plastics manufacturing is responsible for a significant amount of greenhouse gas emissions in the US — as much as one percent. Other air emissions from plastics production include nitrous oxides, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.
Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000.
How many pennies in Russell’s collection are dated after 2000?
A. 480
B. 720
C. 40
D. 60
Answer:
A.480
Explanation:
25% of 1200 is 300 pennies
and 35% of 1200 pennies is 420
therefore:
420+300= 720
1200-720 = 480