Exponential- Percent Increase/Decrease

Make the percent to decimal.
7%

• .007
• 0.07
• 7
• 70

Make the percent to decimal.
25%

• 2.5
• 25
• 0.025
• 0.25

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

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

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%

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• f(x)=400(1.3)^x
• f(x)=400(.97)^x
• f(x)=400(1.03)^x
• f(x)=400(0.03)^x

Your shiny new boat cost $7650.  The depreciation for your boat is 14% per year.  What is the equation that models this problem for the value of the vehicle in 3 years?

• y= 7650(.14)³
• y= 7650(.86)³
• y= 7650(-.14)³
• y= 7650(1.14)³

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation?

• y=8(15,000)^x
• y=15,000(1.08)^x
• y=15,000(0.92)^x
• y=15,000(0.08)^x

Make the percent to decimal.
142%

• 1.42
• 14.2
• 142.
• 0.142

Make the percent to decimal.
0.32%

• 32
• 0.32
• 3.2
• 0.0032

To change the percent into a decimal you must...

• Move the decimal to the left two spaces
• Move the decimal to the right two spaces
• Keep the decimal where it is
• Multiply the number by 10