In the 1980s, the population of Pleasanton decreased by 10%. In the 1990s, its population increased by 30%.

How does the population of Pleasanton at the end of the 1990s compare with its population in 1980?

A) It is 20% higher. B) It is 23% higher. C) It is 40% higher. D) It is 17% higher.

According to the statement, the population of Pleasanton is reduced by a factor of 0.9 in the 1980s and increased by a factor of 1.3 in the 1990s. The increase rate is found by means of this formula:

[tex]x =[(0.9)\cdot (1.3)-1]\cdot 100[/tex]

[tex]x = 17\,\%[/tex]

The population of Pleasanton is 17 % higher. (Right choice: D)

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In the 1980s, the population of Pleasanton decreased by 10%. In the 1990s, its population increased by 30%.How does the population of Pleasanton at the end of the 1990s compare with its population in 1980?A) It is 20% higher. B) It is 23% higher. C) It is 40% higher. D) It is 17% higher.

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In the 1980s, the population of Pleasanton decreased by 10%. In the 1990s, its population increased by 30%.

How does the population of Pleasanton at the end of the 1990s compare with its population in 1980?

A) It is 20% higher. B) It is 23% higher. C) It is 40% higher. D) It is 17% higher.