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blagie [28]
2 years ago
12

Which was a requirement of the Clean Air Act?

History
1 answer:
KengaRu [80]2 years ago
8 0

Answer:  B) Cleaner-burning gas had to be used in cars.

Explanation:

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The graph shows changing population statistics during the early part of the twentieth century.
LenaWriter [7]

Answer:

By the 1930s the African American population of the Midwest and Northeast  had more than doubled since 1900.

Explanation:

Given that the African-American population in the Midwest and Northeast was 500,000 people in 1900, and rose to 1,250,000 by 1930, to determine the percentage by which said population increased, the following calculation must be performed:

500,000 = 1

1,250,000 = X

1,250,000 x 1 / 500,000 = X

2.5 = X

Thus, the African American population in those regions had more than doubled during that period of time.

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when one part of a car fails , the rest of the car dosent run properly , explain why this happens in terms of systems
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Answer: A car cant run properly without the whole car.

Explanation:

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