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Problem of the day…. You have to pay the first $500 of car repairs following an accident. The money you pay is called your:. Planning Ahead Saving money is an important part of financial freedom and responsibility. What are the advantages of having a savings account ? Brainstorm Ideas!.

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problem of the day
Problem of the day….
  • You have to pay the first $500 of car repairs following an accident. The money you pay is called your:
slide2

Planning Ahead

Saving money is an important part of financial freedom and responsibility.

What are the advantages of having a savings account?

Brainstorm Ideas!

anticipation where does all that money come from
Anticipation- where does all that money come from???
  • Simple ways to save money
  • Using your smart phone to save money– justify that expensive phone
  • Can you come up with more?
why save money a little goes a long way
WHY SAVE MONEY?A little goes a long way…

Person 1 (age 18) puts away $3,000 per year in her Individual Retirement Account (IRA) earning 10% - she does this for 10 years then stops.

She accumulates $1,239,564 by the age of 65.

3000 x .10 x 10 years

Money continues to grow 47 years

  • Person 2 waits until he is 28. He contributes $3,000 to his IRA account earning 10% for 37 years.
  • He accumulates $1,102,331 by the age of 65.
  • 3000 x .10 x 37 years
time value of money
Time Value of Money

Time value of money -- Money to be paid out or received in the future is not equivalent to money paid out or received today.

slide6
Rule of 72

8% x no. of years = 72

Time needed for money to doubleor 72 divided by the rate$1,000 at 8% will double in approximately 9 years
slide7
Examples: @ 2% years to double =

Example: @ 4% years to double =

36 years, 18 years

slide9
A few years back I was having a conversation with some people on how whenever you decide to invest in something for the long term, you should always think ahead on what would be the best choice in the long run while having persistence to follow through with it. The scenario was that if you were given a choice to receive one million dollars in one month or a penny doubled every day for 30 days, which one would you choose? When I first heard this, I knew that the penny doubled everyday must have been the better choice to go with as it was a little obvious to me that it had to be a trick question of some sort. But how much better would it be was not something that I knew immediately. So to demonstrate this, it was actually written out with all the calculations and it turned out to something like this:
slide10

Day 1: $.01

  • Day 2: $.02
  • Day 3: $.04
  • Day 4: $.08
  • Day 5: $.16
  • Day 6: $.32
  • Day 7: $.64
  • Day 8: $1.28
  • Day 9: $2.56
  • Day 10: $5.12
  • Day 11: $10.24
  • Day 12: $20.48
  • Day 13: $40.96
  • Day 14: $81.92
  • Day 15: $163.84
  • Day 16: $327.68
  • Day 17: $655.36
  • Day 18: $1,310.72
  • Day 19: $2,621.44
  • Day 20: $5,242.88
  • Day 21: $10,485.76
  • Day 22: $20,971.52
  • Day 23: $41,943.04
  • Day 24: $83,886.08
  • Day 25: $167,772.16
  • Day 26: $335,544.32
  • Day 27: $671,088.64
  • Day 28: $1,342,177.28
  • Day 29: $2,684,354.56
  • Day 30: $5,368,709.12
slide11

Time Value of Money: Money is worth more in the future, than what it is worth today.

This all boils down to one concept:

Patience

slide12

Lesson Objective

Calculate simple interest and the amount.

Content Vocabulary

  • Interest ( I )

interest

The amount of money paid for the use of a lender’s money.

simple interest

Interest paid only on the original principal.

principal

The amount of money earning interest.

annual interest rate

The percent of the principal earned as interest in one year.

  • simple interest
  • Principal (P)
  • annual interest rate (R)
time t
Time (T)

The amount of time for which the principal is borrowed or invested. (How long was the money in the bank?)

When you calculate time in an equation, it must be writtenas “part of a year” if it is less than a year.

 Examples: 3 months 3/12______

7 months __7/12____

15 days _15/365_____

26 days __26/365____

amount
AMOUNT

If the interest is computed and deposited into the account, the new quantity is called the amount.

Amount = Principal + Interest (A = P + I)

example
Example:

You open a savings account and deposit $9,000. Your bank advertises a 5.5% annual interest rate. If you don’t make any deposits or withdrawals, how much interest will you make in 3 years?

Principal ($_9000__) x Rate (__5.5_%) x Time (_3 years)

1. Convert the rate to a decimal: _______% = _.055_____

2. If the “Time” is less than a year, write it as part of a year (this example is not)

slide18

3. Multiply the Principal x Rate x Time:

$__9000___ x __.055__ x 1____ = $___495____

You will make $__495___ interest in 1 year.

4. Find the “Amount” = P + I

Principal ($__9000) + Interest ($_495_) = $_9495_

using the same example how much interest will you earn at the end of 3 months
Using the same example, how much interest will you earn at the end of 3 months?

Interest = P ($_9000__) x R (.055) x T (__3/12___) remember it is part of a year

$_9000 x .055 x 3_÷ 12_= $_123.75_(interest for 3 months)

Amount = $_9000___ + $123.75_ = $__9123.75

using the same example calculate the interest earned for 3 days
Using the same example, calculate the interest earned for 3 days.

Interest = P ($_9000_) x R (_5.5%) x T (3/365)

$__9000 x _.055 x _3_ ÷ _365_ = $_4.07_

Interest = $__4.07___(round final answer to a dollar amount)

Amount: $_9000 + $_4.07___= $_9004.07_

assignment
Assignment:

p. 224 (5-14)

**for #8 use 15

12

answer key for p 224
Answer key for p. 224:

5a. $216 b. $936

6a. $18 b. $738

7a. .59 b. $720.59

8a. $506.36 b. $6,398.51

9a. $232.57 b. $27,201.01

10. $760 x .05 x 3/12 = $9.50

11. $2,430 x .0675 x 65/365 = $769.50

slide24

12. 618.75 = 15,000 x .055 x T/12

618.75 = 825T

12

Multiply both sides by 12: 7425 = 825T

Divide each side by 825: 9 = T (9 months)

10,000 = P x .0475 x 90

365

10,000 = .0117123288 P

P = $853,801.1672 = $853,801.17

slide25

$75,760 – 73,000 = $2760 (this is the interest)

$2,760 = $73,000 x .075 x T

12

$2,760 = 456.25 T

6.049314068 (6 months)

March 1 plus 6 months = September 1

slide26

#15 Warm-up

9,364.85 x .04 x 5/ 365 = 5.13

8,364.85 x .04 x 12/365 = 11.00

6364.85 x .04 x 10/365 = 6.98

4364.85 x .04 x 3/365 = 1.44

Total 24.55

30 days of activity