SS Day 8 B

A new savings account is opened with $400 and gains 3% every year. Is this a growth or decay?

• growth

• decay

The attendance at the art museum at the New Year’s opening was 250 people. The attendance has been increasing at a rate of 3% each month. Is this a growth or decay?

• decay

• growth

You have inherited land that was purchased for $30,000 in 1990. The value of the land increased by approximately 5% per year. What is the approximate value of the land in the year 2011?

• $83,579
• $10,217
• $14,963,655
• $28,500

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

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

• y= 7650(.14)³
• y= 7650(.86)³
• y= 7650(1+.86)³
• y = 7650(1.14)³

Apply the exponential growth or decay formula to calculate the final amount: Initial amount = 200, growth/decay rate = 5%, time = 8 years

• 320.45

• 180.25

• 150.00

• 268.78

• Exponential Growth

• Exponential Decay

• Linear

• None

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?

• 9765

• 9006

• 5433