Percentage Growth

Bobo bought a gold coin for $20 000 three years ago. The value of the gold coin increased by 20% each year. The present value of the gold coin is

• $28 000

• $28 800

• $32 000

• $34 560

A watch was worth $40 000 at the beginning of 2012. Its value increased by 10% every half year. At the end of 2013, its value was

• $58 564

• $53 240

• $48 400

• $44 000

The number of new born babies in a city was 150 000 in 2012. The number of new born babies increased by 5% each year. The increase in the number of babies from 2012 to 2014 was

• 7500

• 15 375

• 157 500

• 163 375

The profit of a company increases by 18% each year. The profit of the company is $380 000 this year. Find the profit of the company two years ago. (correct to 3 sig. fig.)

• $256 000

• $273 000

• $529 000

• $565 000

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(1.035)^x

• y = 15(1.35)^x

• y = 15(0.35)^x

• y = 15(0.65)^x

What is the percentage rate of growth or decay?

• 12%

• 88%

• .12%

• 112%

• .88%

What is the percent growth or decay of the following function?

Since January 1980, the population of the city of Brownville has grown according to the mathematical model y=720,500(1.022)^x, where x is the number of years since January 1980. What is the percentage increase of the population annually?

• 720,500%

• 102.2%

• 2.2%

• 22%

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What percent did the population increase each year?

• 4%

• It doesn't say

• I don't know

• 400%