the sum of one-third , one -fourth and half of a number is 169 . find the number​

Answer:

The period of European history extending from about 500 to 1400–1500 CE is traditionally known as the Middle Ages. The term was first used by 15th-century scholars to designate the period between their own time and the fall of the Western Roman Empire. The period is often considered to have its own internal divisions: either early and late or early, central or high, and late.

Answer:

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Explanation:

the period of European history extending about 500 to 1400-1500 ce traditional knows as the middle age . The term was first use by 15 - centure

Answer:

i was reading books in front of library in the music cafe

Explanation:

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Explanation:

Differences between pure air and polluted air:

Pure Air:

Pure air contains around 78% nitrogen, 21% oxygen, and 0.03% carbon dioxide also small amounts of argon, methane, ozone, and water vapours.

Smog is not present.

Not harmful for human beings

polluted air:

Polluted air includes gases like sulfur dioxide, nitrogen dioxide, carbon dioxide, etc. and other particulate matter.

Smog can be present.

Harmful for human beings as cause diseases like asthma

Answer:

Differences between pure air and polluted air:

REFER TO THE ABOVE ATTACHMENT FOR ANS

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Answer:

For example, natural disasters caused by a geological process are called geological disasters; these are earthquakes, tsunamis, volcanic eruptions, and landslides. Disasters caused by weather-related factors are floods, landslides, droughts, forest fires, and tornadoes

Explanation: