CCSS.Math.Content.HSF.LE.A.2

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

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CCSS.Math.Content.HSF.LE.A.2

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

• 81
• -34
• -146
• -225

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CCSS.Math.Content.HSF.LE.A.2

In 1985, there were 285 cell phone subscribers in the small town of Centerville. The number of subscribers increased by 75% per year after 1985. How many cell phone subscribers were in Centerville in 1994?

• OVERFLOW
• 1994
• 1000
• 43871

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CCSS.Math.Content.HSF.LE.A.2

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

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CCSS.Math.Content.HSF.LE.A.2

The next two terms of the sequence
4, 7, 10, 13 are ....

• 16 and 19
• 15 and 19
• 16 and 18
• 15 and 18

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CCSS.Math.Content.HSF.LE.A.2

Find the next 3 terms in this geometric sequence 5,-10,20,-40

• -80,160,-320
• 160,-320,640
• 80,-160,320
• -160,320,-640

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CCSS.Math.Content.HSF.LE.A.2

Is the sequence arithmetic: -3, 3, -3, 3, ...

• Yes
• No

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CCSS.Math.Content.HSF.LE.A.2

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

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CCSS.Math.Content.HSF.LE.A.2

What are the first 4 terms of...
a_n = 3(2)^(n-1),      

• 6, 12, 24, 48...
• 6,18, 54,162
• 3, 6, 12, 24...
• 3, 6, 9, 12...

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CCSS.Math.Content.HSF.LE.A.2

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1
• a_n = 3(4)^n-1
• a_n = -4(3)^n-1
• a_n = 3(-4)^n-1

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CCSS.Math.Content.HSF.LE.A.2