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maksim [4K]
3 years ago
15

Using the table below, write a function rule for the balance in the CD account after any number of years. Let y represent the va

lue of the investment at the end of any year x.
CD/Year
Beginning Balance
Interest Earned
Ending Balance
Savings Account/Year
Beginning Balance
Interest Earned
Ending Balance
1
$700
$22
$722
1
$700
$25.90
$725.90
2
$722
$22
$744
2
$725.90
$26.86
$752.76
3
$744
$22
$766
3
$752.76
$27.85
$780.61
4
$766
$22
$788
4
$780.61
$28.88
$809.49
5
$788
$22
$810
5
$809.49
$29.95
$839.44
Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
8 0

Answer:

  y = 700 +22x

Step-by-step explanation:

The CD account balance is 722 after the first year and increases by $22 each year. The function rule is a linear function with a y-intercept of 700 and a slope of $22 per year.

  y = 700 +22x . . . . . . ending balance after x years

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4 0
3 years ago
Georgie put $500 in her savings account, earning interest at a rate of 4% each year. She did not make any more deposits or withd
zysi [14]

Answer:

a) $520

b) $580

c) Interest amount is same each year

Step-by-step explanation:

Given - Georgie put $500 in her savings account, earning interest at a rate of 4% each year. She did not make any more deposits or withdrawals.

To find - a) How much money was in the account after one year?

              b) How much money was in the account after 4 years?

              c) Was the amount of money earned in interest the same or different each year?

Proof -

Here given that,

Principal amount = $500

rate of interest = 4% = 4/100 = 0.04

Now,

a)

Amount =  P [ 1 + RT ]

             = 500 [ 1 + 0.04(1)]

             = 500 [ 1 + 0.04] = 520

⇒Amount = $520

b)

Amount =  P [ 1 + RT ]

             = 500 [ 1 + 0.04(4)]

             = 500 [ 1 + 0.16] = 580

⇒Amount = $580

c)

In 2nd year,

Amount =  P [ 1 + RT ]

             = 500 [ 1 + 0.04(2)]

             = 500 [ 1 + 0.08] = 540

⇒Amount = $540

Now,

Interest in 1st year = 520 - 500 = 20

Interest in 2nd year = 540 - 520 = 20

So,

The interest amount  is same each year

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3 years ago
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3 years ago
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Answer:

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2 years ago
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