Exponent Rules and Exponential Growth vs Decay

Is this exponential growth or decay?

• Growth, because of 7

• Decay, because of 1.2

• Growth because of 1.2

• Decay because of 7

Pick the equation that is exponential growth

• y=2(0.5)^x

• y = 0.5(2)^x

• y = .5x - 2

• y = 2x + .5 

Is the pictured graph exponential growth, exponential decay, linear growth, or none?  

• Exponential Growth

• Exponential Decay

• Linear Growth

• None of the above

Is this exponential growth or decay?

• Growth

• Decay

• A

• B

• C

• D

The population of a school is 2200 and is increasing at a rate of 2% each year. Find the population after 6 years.

Emily is culturing bacteria that have a growth rate of 5% per hour. If the current population is 36,000 bacteria, how many bacteria will there be in 12 hours? If necessary, round your answer to the nearest whole number.

• 8,789,062 bacteria.

• 19,452 bacteria.

• 61,572 bacteria.

• 64,651 bacteria.

This is an example of.....

• exponential decay

• exponential growth

• constant change

• a linear function

The number of research papers in Professor Sycamore area of expertise has been increasing by 5% every year. Given that 30,010 research papers were published this year. Assuming the trend continues, which equation projects the amount of research papers published in x years?

• y = 30,010 (.05)^x

• y = 30,010 (1.05)^x

• y = 30,010 (.95)^x

• y = 30,010 (5)^x

How many fruit flies are in the population after 7 days (1 week)?

• 140 flies

• 105 flies

• 101 flies

• 735 flies