CCSS.Math.Content.HSF.LE.A.1

Is this exponential growth or decay?

• Growth
• Decay

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CCSS.Math.Content.HSF.LE.A.1

Courtney saved up $2,200 working as a waitress over the summer. She put this money into a bank account that earned 5.2% interest and is compounded daily. How much will she have in her account at the end of 4 years?

• $2201.25
• $2694.55
• $2707.45
• $2708.63

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CCSS.Math.Content.HSF.LE.A.1

Suppose a culture of bacteria begins with 500 cells and dies by 30% each year. Write an equation that represents this situation.

• y = 500(0.7)ⁿ
• y = 500(1.3)ⁿ
• y = 500(1.7)ⁿ
• y = 500(1.13)ⁿ

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CCSS.Math.Content.HSF.LE.A.1

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

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CCSS.Math.Content.HSF.LE.A.1

The growth factor for this table is 

• 2
• 4
• 12
• 144

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CCSS.Math.Content.HSF.LE.A.1

Which of the following is an example of exponential decay?

• y = 3(5)^x

• y = .5(5)^x

• y = 2(.5)^x

• y = 8(1)^x

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CCSS.Math.Content.HSF.LE.A.1

Your returns (or interest rate) are 6% a year. How long before your investment doubles?

• 18 years
• 16 years
• 12 years
• 8 years

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CCSS.Math.Content.HSF.LE.A.1

Identify the function family.

• Linear

• Exponential

• Quadratic

• Constant

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CCSS.Math.Content.HSF.LE.A.1

Anne currently brings in an annual salary of $46,000 and anticipates a raise of 5% every year.

Okay, now we know this is growth, r = .05, and a = 46,000. Put it all together in an exponential equation. Type it in this format, filling in the values and simplifying: y=a(1+r)^x

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CCSS.Math.Content.HSF.LE.A.1

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(1-0.03)^x
• f(x)=400(1+0.03)^x
• f(x)=400(0.03)^x

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CCSS.Math.Content.HSF.LE.A.1