Growth and Decay Questions

What is the city population in thousands per year?

40 (1.05)^x

• City population increases by 105% annually.

• City population increases by 40% annually.

• City population increases by 50% annually.

• City population increases by 5% annually.

What is the yearly change in Radioactive Decay?

7.5(0.90)^x

• Substance loses 7.5% of mass each year.

• Substance loses 90% of mass each year.

• Substance loses 10% of mass each year.

• Substance gains 10% of mass each year.

What is the rate in Bacteria Culture every three hours?

10 (2)^x

• Doubles

• 20%

• Triples

• 10%

What is the car's depreciation per year?

18 (0.85)^x

• Car value decreases by 18% per year.

• Car value decreases by 15% per year.

• Car value decreases by 85% per year.

• Car value decreases by 185% per year.

What is the investment growth per year?

25 (1.07)^x

• Investment grows at 107% per year.

• Investment grows at 17% per year.

• Investment grows at 7% per year.

• Investment grows at 25% per year.

The temperature of the coffee cooling every 10 minutes.

90 (0.80)^x

• Temperature drops by 80% every 10 minutes.

• Temperature drops by 20% every 10 minutes.

• Temperature drops by 10% every 10 minutes.

• Temperature drops by 90% every 10 minutes.

What is the forest expansion annually?

8 (1.02)^x

• Forest area increases by 8% annually.

• Forest area increases by 102% annually.

• Forest area increases by 20% annually.

• Forest area increases by 2% annually.

What is the change in Medicine Concentration per hour?

100 (0.75)^x

• decreases by 75% per hour

• decreases by 100% per hour

• decreases by 2.5% per hour

• decreases by 25% per hour

What is the change in the Savings Account balance every month?

7500(1.03)^x

• balance increases by 3% monthly

• balance increases by 30% monthly

• increase by 103%

• increase by 0.3%

What is the change in Ice Melt per day?

7.8 (0.95)^x

• the ice melts at 95% per day

• the ice melts at 7.8% per day

• the ice melts at 78% per day

• the ice melts at 5% per day