Solve simple and compound word problems

(Simple Interest)
What was the interest rate if your balance on an investment of $830 at the end of one year is $871.50? 

• 5% 
• 4%
• 41.5%
• 7%

(Simple Interest)
How much interest is earned on $140 at 7% for five years? 

• 20%
• $49
• $5
• 49%

(Simple Interest)
The ending balance on an investment is $1,620.24. If the principal was invested at 8% for nine years, what was the principal?

• $492
• $129.62
• $942 
• $192.69

Tags

CCSS.7.RP.A.3

(Simple Interest)
How much principal must be invested to earn $403.20 in seven years at an interest rate of 9%? 

• $
• $36.29
• $
• $640 

(Simple Interest)
How long must $217 be invested at a rate of 6% to earn $78.12 in interest? 

• 6 years
• 4 years
• 8 years
• 2 years

Tags

CCSS.6.EE.B.7

Compound Interest
The ending balance on an investment is $248.29. If the principal was invested at 3% compounded annually for eight years, what was the principal? 

• $296
• $196 
• $169
• $170

Compound Interest
What is the interest rate if a principal of $892 earns $523.49 in interest compounded annually in six years?

• 8% 
• 10%
• 12%
• 6%

Compound Interest
The ending balance on an investment is $802.99. If the principal was invested at 4% compounded annually for five years, what was the principal?

• $545
• $660 
• $382
• $198

Compound Interest
You put $547 into an investment at 5% compounded quarterly for two years. What will the balance be at the end of two years?

• $332.34
• $487.86
• $504.18
• $604.15

Compound Interest
At what rate was an investment made that obtains $136.84 in interest compounded quarterly on $320 over four years? 

• 8%
• 7%
• 9% 
• 10%