The population of a city Increased over time. The population in 1990 was 40,000 when they started the population survey. $$f\left(x\right)=40000\left(1.05\right)^x$$ represents this situation. What does 40000 mean?

Population when they started the survey

The expression 5(2) t gives the number of leaves in a plant as a function of the number of weeks since it was planted. What does 2 represent in this expression?

The number of leaves is multiplied by 2 each week.

There were initially 2 leaves in the plant.

The plant was planted 2 weeks ago.

The expression 1350(1.05) t models the average wages, in dollars, in the US as a function of the number of years since 1930. What does 1.05 represent in this expression?

The averages wages in the US increase by about 5% each year.

The average wages in the US were about $1.05 in 1930.

The average wages double every 1.05 years.

The equation y = 4∙3 x gives the number of ducks living in Anoop's pond x years after he built it. What does 4 represent in this equation?

There were 4 ducks living in Anoop's pond when he first built it.

The number of ducks living in Anoop's pond is multiplied by 4 every year.

It has been 4 years since Anoop built the pond.

The equation $$f(t)=1.5(1.09)^t$$ models the housing costs, in thousands of dollars, for summer term t years since Chinedu applied to his college. What does 1.09 represent in this equation?

The summer housing costs increase by 9% each year.

The summer housing costs were $1,090 the year that Chinedu applied to his college.

Chinedu applied to his school 9 years ago.

Algebra C&C Unit 5 Quiz Review

Authored by Hyejoo Jeong

Mathematics

9th Grade

CCSS covered

Used 13+ times

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18 questions

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Write 0.075 as a percent.

75%

7.5%

0.75%

750%

Tags

CCSS.5.NBT.A.2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Write 86% as a decimal.

86.0

8.6

0.86

0.086

Tags

CCSS.5.NBT.A.3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify whether the following scenario represents exponential growth or decay: A population of bacteria doubles every hour.

Exponential growth

Exponential decay

Linear growth

Logarithmic growth

Tags

CCSS.HSF-IF.C.8B

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify whether the following scenario represents exponential growth or decay: The value of a car decreases by 10% each year.

Decay

Growth

Stagnation

Increase

Tags

CCSS.HSF-IF.C.8B

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Growth

Decay

Tags

CCSS.HSF-IF.C.8B

MULTIPLE CHOICE QUESTION

1 min • 1 pt

40000

1.05

0.05

1+0.05

Tags

CCSS.HSF-IF.C.8B

MULTIPLE SELECT QUESTION

45 sec • 1 pt

40000

1.05

0.05

1+0.05

Tags

CCSS.HSF-IF.C.8B

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Algebra C&C Unit 5 Quiz Review

Write 0.075 as a percent.

Write 86% as a decimal.

Identify whether the following scenario represents exponential growth or decay: A population of bacteria doubles every hour.

Identify whether the following scenario represents exponential growth or decay: The value of a car decreases by 10% each year.

Write the exponential growth or decay equation for the following scenario: The value of a house depreciates by 15% each year. The current value is $300,000.

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