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Section 11.3 #2 notes atm.notebook February 16, 2017 Section 11.3 Continued Calculate the interest on $1500 at 4% compounded quarterly for 5 years. Warm up Calculate the interest for the problem above using the simple interest formula. The interest rates are the same, but the compound interest pays more interest.

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Page 1: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Section 11.3 Continued

Calculate the interest on $1500 at 4% compounded quarterly for 5 years.  

Warm up

Calculate the interest for the problem above using the simple interest formula.

The interest rates are the same, but the compound interest pays more interest.  

Page 2: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

To determine the actual interest rate, annual percentage yield (APY), per year, use $1 for the principal and then use the compound interest formula.

Interest Rate = Amount ­ Principal

The effective annual yield or annual percentage yield (APY) is the simple interest rate that gives the same amount of interest as a compound rate over the same period of time.

Example: Find the APY for $1 invested for 5 year at 4% compounding quarterly

$1

Page 3: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Example 4

Determine the annual percentage yield (APY) for $1 invested for 1 year at a) 8% compounded daily. (360 days)

b) 6% compounded quarterly.

Page 4: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 5: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 6: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 7: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Present Value

How much must you deposit in an account today at a given rate of interest so that it will accumulate to $25,000 to pay your child's college costs in 4 years?

The principal, p, that would have to be invested now is called the present value.  

Page 8: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 9: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 10: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 11: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017

Page 12: Section 11.3 #2 notes atm.notebook - Ken Joneskjones0726.weebly.com/uploads/8/7/9/4/8794288/2-16_atm.pdf · 2018-09-06 · Section 11.3 #2 notes atm.notebook February 16, 2017 Example

Section 11.3 #2 notes atm.notebook February 16, 2017