The replacement-level fertility rate is the fertility rate that would replace a population from one generation to the next. What is the current estimated replacement-level fertility
rate?
A. 2.1
B. 1.5
O c. 2
D. 1

The correct answer is A. The current estimated replacement-level fertility rate is 2.1.

Explanation:

The replacement fertility rate is the number of children that a couple must have to, as a minimum, guarantee that the population of a certain social group remains stable and does not decrease. Thus, as long as a couple is made up of 2 people, when both members die, it is understood that their replacement is guaranteed if this couple has had at least 2 children. Now, given that there are non-reproductive variables, such as people who emigrate from the country, to guarantee that the population does not decrease in the face of these variables, the replacement rate is considered to be 2.1 children per couple.

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the answer is b. ''a 12 cm 3 block of aluminum with a mass of 2 grams''.