Exponential Percent Growth

Look at the following exponential equation and tell the percent of Growth or Decay;

y = 1.5(.89)^x

• 1.5% Growth

• 11% Decay

• 89% Decay

• 89% Growth

Look at the following exponential equation and tell the percent of Growth or Decay;

y = .25(2)^x

• 75% Decay

• 100% Growth

• 25% Decay

• 200% Growth

Which of the following exponential functions represent a 25% Growth?

• y = 3.4(1.25)^x

• y = 1.25(.25)^x

• y = .25(2)^x

• y = 3(25)^x

You have inherited land that was purchased for $30,000 in 1960. The value of the land increased by 5% each year. What is the approximate value of the land in the year 2011? Round to the nearest dollar.

At the start of the school year, 200 kids have internet access at home. The number of students having internet access at home increases 20% each month. After 4 months, how many students have internet access at home? Round to the nearest whole number

A population of 50,000 increases by 1.4% each year. Write an equation to represent the function.

In 1985, there were 285 cell phone subscribers in the small town of Chestertown. The number of subscribers increased by 75% per year after 1985. How many cell phone subscribers were in Chestertown in 1994? Round to the nearest whole number.

Bacteria can multiply at an alarming rate, when each bacteria splits into two new cells, thus doubling. If we start with only one bacteria which can double every hour, how many bacteria will we have at the end of one day?