Rule of 72

How long would it take to double money in a account with a 2% interest rate?

• 36 years

• 144 years

• 72 years

Tags

CCSS.7.RP.A.3

How long would it take to double money in a account with a 0.5% interest rate?

• 144 years

• 36 years

• 18 years

Tags

CCSS.7.RP.A.3

You start with $500. You place it in an account earning 12% per year.

When will it double?

• 6 years

• 12 years

• 41 years

Tags

CCSS.7.RP.A.3

You start with $500. You place it in an account earning 12% per year.

It will double after 6 years, how much will you have?

• $1000

• $500

• $5000

Tags

CCSS.7.RP.A.3

You start with $1000. You place it in an account earning 3% per year.

When will it double?

• 24 years

• 12 years

• 33 years

Tags

CCSS.7.RP.A.3

You start with $1000. You place it in an account earning 3% per year.

It will double after 24 years, how much will you have?

• $2000

• $3000

• $24,000

Tags

CCSS.7.RP.A.3

You start with $200. You place it in an account earning 9% per year.

When will it double?

• 8 years

• 22 years

• 12 years

Tags

CCSS.7.RP.A.3

You start with $200. You place it in an account earning 9% per year.

It will double after 8 years, how much will you have?

• $400

• $2000

• $1800

Tags

CCSS.7.RP.A.3

You start with $400. You place it in an account earning 8% per year. 

When will it double?

• 9 years

• 8 years

• 50 years

Tags

CCSS.7.RP.A.3

You start with $400. You place it in an account earning 8% per year. 

It will double in 9 years, how much will you have?

• $800

• $3200

• $3600

Tags

CCSS.7.RP.A.3