Unit 5 IM Test

The population of a city increases by 5% every year. If its population today is 300,000, what will its population be in 2 years?

• 300,000 (0.05)

• 300,000 (1.05)

• 300,000 (1.05)(2)

At the beginning of the year, the number of books owned by a library was 10,000. Since then, it has grown by 1% each month.
Which expressions represent the number of books, in thousands, owned by the library 5 years later if it continues to grow at that rate? (hint, there are 2)

• A

• B

• C

• D

• E

For which function does f decrease by 15% every time x increases by 1?

• A

• B

• C

• D

• $182.26

• $162.82

• $126.82

• $126.28

• The cost decreases by 4% per year.

• The cost increases by 4% per year.

• About $89.54

• About $54.98

• About $98.54

When a child is born, her grandfather decides to put $100 in an account that earns interest. He plans to make no other deposits or withdrawals for 18 years. When the child
turns 18 years old, the money in the account will be a birthday gift. The grandfather is choosing between two options:
Option 1: An account that grows by 10.5% each year.
Option 2: An account that grows by $20 each year.

Which equation would he use to calculate Option 1?

When a child is born, her grandfather decides to put $100 in an account that earns interest. He plans to make no other deposits or withdrawals for 18 years. When the child
turns 18 years old, the money in the account will be a birthday gift. The grandfather is choosing between two options:
Option 1: An account that grows by 10.5% each year.
Option 2: An account that grows by $20 each year.

Which equation would he use to calculate Option 2?

When a child is born, her grandfather decides to put $100 in an account that earns interest. He plans to make no other deposits or withdrawals for 18 years. When the child
turns 18 years old, the money in the account will be a birthday gift. The grandfather is choosing between two options:
Option 1: An account that grows by 10.5% each year.
Option 2: An account that grows by $20 each year.

Which option will result in a better 18th birthday gift?

• Option 1 with a total of just over $600

• Option 2 with a total of $460