Step-by-step Solution:
Let’s analyze the given population pyramid for Botswana in 2050 and solve the two parts of the problem step by step.
1. In 2050, there will be more people in Botswana in their 30s than in any other decade of age.
Analysis:
What does the graph show?
The population pyramid shows the number of people (in thousands) on the horizontal axis and age groups (in 5-year increments) on the vertical axis.
Each bar represents a specific 5-year age group, such as 0–4, 5–9, etc.
The longer the bar, the larger the population for that age group.
Breaking it into decades:
Each decade of age combines two 5-year groups:
0–9: Combine the bars for 0–4 and 5–9.
10–19: Combine the bars for 10–14 and 15–19.
And so on...
Observing the graph:
The bars for the 30–34 and 35–39 age groups are the widest, meaning the population of people in their 30s (30–39) is the largest compared to any other decade of age.
Conclusion:
In 2050, the population of Botswana in their 30s (30–39) will indeed be higher than any other age decade.
2. In 2050 in Botswana, the five-year age group with the highest percentage of females will be 85–90.
Analysis:
Excess female population:
In the population pyramid, the dotted lines within the more-populous gender indicate the population of the less populous gender.
The area outside the dotted line represents the "excess population" of either males or females.
Look for a group with the largest female excess:
In the upper age groups (above 70), the bars for females become significantly longer than those for males, especially in the 85–89 range.
This means there is a higher percentage of females in this age group compared to males.
This is typical in older age groups because women tend to have a longer life expectancy than men.
Conclusion:
The 85–89 age group has the highest percentage of females compared to males in 2050.
Final Answer:
The decade with the most people will be the 30s (30–39).
The five-year age group with the highest percentage of females will be 85–89.
These conclusions are based on observations and logical interpretation of the graph.