Simple, Compound, and Continuous Compound Interest

What is the formula for simple interest?

• A=P(1+r)^t
• I=Prt
• I=P(1+r)t
• A=Prt

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CCSS.8.EE.C.7B

Dan borrowed $2,000 for 6 months at 12% annual simple interest rate. How much interest is that?

• $120
• $144
• $1,200
• $1,440

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CCSS.7.RP.A.3

Find the balance in the account after the given period.

$12,000 principal earing 4.8% compounded annually after 7 years.

• $3,243.19

• $16,661.35

• $15,243.19

• $4,661.35

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CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

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CCSS.HSF.LE.A.2

Find the balance in the account after the given period.

$5000 deposit earning 1.5% compounded quarterly after 3 years

• $5,229.70

• $7,604.38

• $7,777.27

• $5,538.86

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CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.B.5

If $1,000 is invested at 16% interest, compounded continuously, for five years, what is the ending balance?

• $1,225,54
• $2,225.54
• $22,255.40
• $225.54

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CCSS.HSA.CED.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.B.5

Courtney saved up $2,200 working as a waitress over the summer. She put this money into a bank account that earned 5.2% interest and is compounded daily. How much will she have in her account at the end of 4 years?

• $2201.25
• $2694.55
• $2707.45
• $2708.63

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CCSS.HSA.CED.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

Principal: $999
Interest Rate: 5.45%
Time: 19 years
Compounded Quarterly
State the future account balance.

• $2794.10
• $2738.11
• $2774.98
• $2807.11

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CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

Principal: $5000
Interest Rate: 3.75%
Time: 25 years
Compounded Monthly
State the future account balance.

• $12712.31
• $12,749.30
• $12,657.59
• $12550.84

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CCSS.HSA.CED.A.1

CCSS.HSA.SSE.B.4

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

Riley invested $1,000 in savings bonds. If the bonds earn 6.75% interest compounded semi-annually, how much total will Riley earn in 15 years?

• $1,584.62
• $2,651.39
• $2,706.86
• $1,825.10

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CCSS.HSF-LE.A.1C

The simple interest formula is I=Prt.  The P represents the principle.  The principle is ___________________. 

• the amount of money borrowed or deposited
• the amount taxed
• the percent interest for this year
• the amount the bank owes you for being a customer at their bank

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CCSS.7.RP.A.3