Exponential Growth and Decay

In 1960, a population was 100,250. The rate of growth is 1.2%. Use this to predict the population in the year 2000.

• 405,841

• 162, 012

• 62, 034

• 2,537

The population of Dhaka, Bangladesh was 4.22 million in 1990 and its projected population for the year 2000 is 6.49 million. Find the exponential growth rate in percent.

• .044

• 44%

• 1.044%

• 4.4%

The population of Houston, Texas was 2.30 million in 1990 and its projected population for the year 2000 is 2.65 million. Find the exponential growth rate in percent.

• .014

• .014%

• 1.4%

• 14%

30,000=2500e^t*.05. Find t.

• 50 years

• 78 years

• 100 years

• 5 years

The half-life of Zn-71 is .024%. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

• 100 grams

• 96 grams

• 84 grams

• 737 grams

Lorenzo has put $11,000 into a retirement fund. The fund has an estimated annual return of 10%. If Carter doesn't add any more money, how much can he expect to have in the fund in 20 years?

• $74,002.49

• $11,000.00

• $1,635.20

• $81,279.62