Answer:
17,190 years
Explanation:
Each isotope has a characteristic half-life, which is the time required for half of that isotope to decay. After one half-life has elapsed, 50% of the isotope has decayed and 50% remains. After two half-lives, 75% has decayed and 25% remains. After three half-lives, 87.5% has decayed and 12.5% remains. For carbon-14, which has a half-life of 5,730 years, three half-lives corresponds to 17,190 years.
Answer:
nitrogen gas and oxygen gas.
Explanation:
78% of earths atmosphere is made up of nitrogen and 21% is made up of oxygen.
Answer:
If I didn't get information about the weather at my place I will be unprepared. I might wear a jacket when it's to warm outside, or wear a tank top when it's to cold. It might rain when I don't have an umbrella. I might even make plans with someone and the weather ruins our plans.
good enough?
its 56 words
<span>Cultural Destruction.
</span>
C.
EXPLANATION
Mainland Greece is a mountainous land almost completely surrounded by the Mediterranean Sea. Greece has more than 1400 islands. The country has mild winters and long, hot and dry summers. The ancient Greeks were a seafaring people.
-http://www.ancientgreece.co.uk/geography/home_set.html