Question

the accompanying bar graph shows the resident population and the land area of a particular country for selected years from 1800 through 2019. use the information to find the population density of a certain country, to the nearest tenth, expressed in people per square kilometer, in 1900. click here to view the bar graph. the population density in 1900 was approximately (round to the nearest tenth as needed.) bar graph and data year population area (square miles) 1800 5,308,483 864,746 1900 70,439,131 2,949,694 1940 131,669,275 2,971,128 1980 226,545,805 3,539,289 2019 276,563,623 3,550,365 1 in² = 6.5 cm² 1 ft² = 0.09 m² 1 yd² = 0.8 m² 1 mi² = 2.6 km² 1 acre = 0.4 hectare (ha)

Explanation:

Step1: Find population and area in 1900

From the table, in 1900: Population \( P = 70439131 \) people, Area \( A_{\text{mi}^2} = 2949694 \) square miles.

Step2: Convert area to square kilometers

Given \( 1 \text{ mi}^2 = 2.6 \text{ km}^2 \), so \( A_{\text{km}^2} = A_{\text{mi}^2} \times 2.6 \).
\( A_{\text{km}^2} = 2949694 \times 2.6 = 7669204.4 \) square kilometers.

Step3: Calculate population density

Population density \( D = \frac{P}{A_{\text{km}^2}} \).
\( D = \frac{70439131}{7669204.4} \approx 9.2 \) (rounded to the nearest tenth).

Answer:

9.2