Answer:
1.a long, steep slope, especially one at the edge of a plateau or separating areas of land at different heights.
2.3,032miles
3.At more than 42 million acres, the Pantanal is the largest tropical wetland and one of the most pristine in the world. It sprawls across three South American countries—Bolivia, Brazil and Paraguay—and supports millions of people there, as well as communities in the lower Rio de la Plata Basin.
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It is false that the total fertility rate is a measure of the number of children that would be born if all women lived to the life expectancy age for the given country in which they live.
<h3>What is total fertility rate?</h3>
- The number of children that would be born to each woman collectively if she were to survive to the end of her childbearing years and have children in accordance with the current age-specific fertility rates is the total fertility rate for a given year.
- Children per woman is how it is stated. The sum of age-specific fertility rates, which typically apply to women between the ages of 15 and 49, is used to directly calculate the total fertility rate, or five times the sum if the data are provided in five-year age groupings.
- We can predict how a population might increase, decrease, or stable over time by using the TFR, mortality, and migration projections.
- The total fertility rate can be used to forecast future age distributions within a population as well as other demographic changes.
Learn more about total fertility rate here:
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More than 75 percent
Explanation:
Let us carefully analyze this problem:
The half life of the rubidium isotope = 50 billion years
The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.
Every 50years, we know that a rubidium isotope would split into half.
Initially when the isotope was formed, we would only have the parent atoms there. There wont be any daughter;
ratio of parent to daughter = 100 : 0
When the isotope decays to half; we would have equal number of parent and daughter:
ratio of parent to daughter at half life = 50 : 50
The age of the earth is about 4.6billion years;
this is;
x 100 = 9.2% of the half-life of the rubidium isotope.
At this time, we should know that only 9.2 percent of the daughter would have been formed.
The remaining parent would be 100 - 9.2 = 90.8% would still be left undecayed.
The ratio of parent to daughter = 90.8 : 9.2
This is more than 75% of the parent
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Radioactive decay brainly.com/question/10125168
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Answer:
C.
Explanation:
According to the Treaty of Tordesillas, which was signed in 1494 in the city of the same name in Spain, Portugal would have access and colonization rights to the eastern coast of Brazil and Africa. Spain would obtain the vast majority of the Americas. Over time, Brazil became a large and influential part of the Kingdom of Portugal and during this time and after independence expanded to become the largest country in South America in terms of both land and population.
your answer for this question is B)
