Exponentials-TR

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

• f(x)=400(.97)^x
• f(x)=400(1-0.03)^x
• f(x)=400(1.03)^x
• f(x)=400(0.03)^x

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

The original value of a painting is $1400, and the value increases by 9% each year. Write an exponential growth function to model this situation.

• y=1400(1.09)^x
• y=1.09(1400)^x
• y=1400(.91)^x
• y=1.09^x

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months?

• 9766
• 9006
• 9765
• 5433

In the exponential function given below, identify the initial (starting) amount and the growth rate.                                    y = 100(3)^x

• The initial amount is 3 and it is growing by a rate of 100.
• The initial amount is 100 and it is growing at a rate of 3.
• It is not growing at all because this is not an exponential equation.

Daniel’s Print Shop purchased a new printer for $35,000. Each year it depreciates at a rate of 5%. How much will the printer be worth in 8 years?

• $23,219.72

• $136.72

• $51,710.94

• $16,710.94

Is this exponential growth or decay?

• Growth

• Decay

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

• Exponential Growth

• Exponential Decay

• Linear

• None

What is the formula for exponential decay

• I=PRT

A car tire fully inflated is losing 2.5% of its air everyday. The tire originally contained 4500 cubic inches of air. Which equation could be used to represent the loss of air