Algebra I- Unit 10 Test Review

1.  Your new house costs $120,000 and appreciates in value by about 6% each year.

 

a)  Write an equation that would indicate the value of the house at x years.

Tags

CCSS.HSF.LE.A.2

• $82,784.37

• $2,013,265.92

• $491.52

• $170,222.29

Tags

CCSS.HSF.BF.A.2

• 375 grams

• 125 grams

• 500 grams

• 1,500 grams

Tags

CCSS.HSF.LE.A.4

3.  Your baby sister has an ear infection.  The doctor said there are probably  bacteria in her right ear.  The penicillin the doctor prescribed will kill 7% of the bacteria every hour.  Is this an example of exponential growth or decay?

• Growth because the bacteria are growing at a constant ratio.

• Decay because the bacteria are dying at a constant ratio.

• Growth because the bacteria are growing at a constant rate of change

• Decay because the bacteria are dying at a constant rate of change.

4.  You buy a collector’s edition baseball card for $2100. The card increases by 12% annually. Write an exponential function that represents this situation.

Tags

CCSS.HSF.LE.A.2

5.  During normal breathing, about 14% of the air in the lungs is replaced after one breath.  Write an exponential decay model for the amount of the original air left in the lungs if the initial amount of air in the lungs is 300mL.

Tags

CCSS.HSF.LE.A.2

6.  Your new electric car depreciates 6% annually.  If you paid $24,500 for your car, what exponential function could be used to represent the depreciation of your car?

Tags

CCSS.HSF.LE.A.2

• the set of all real numbers less than 2

• the set of all real numbers

• the set of all real numbers less than or equal to 2

• the set of all real numbers greater than 2

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5

• the set of all real numbers greater than 8

• the set of all real numbers less than or equal to 8

• the set of all real numbers less than 8

• the set of all real numbers

Tags

CCSS.HSF-IF.C.7E

• The initial value of John’s house.

• The constant ratio John’s house is decreasing.

• The constant ratio John’s house is increasing.

• The amount of interest John must pay on his mortgage.