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maxy7347go
18.03.2021 •
Business
Liz and Bob just had a baby named Isabelle, and they want to save enough money for Isabelle to go to college. Assume that they start making monthly payments when Isabelle is 5 into an ordinary annuity earning 3.79%, and they calculate that they will need $21,200.00 by the time Isabelle turns 18. How much should they deposit every month so that they reach their goal
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Ответ:
They should deposit $105 every month so that they reach their goal.
Explanation:
Given - Liz and Bob just had a baby named Isabelle, and they want to
save enough money for Isabelle to go to college. Assume that
they start making monthly payments when Isabelle is 5 into an
ordinary annuity earning 3.79%, and they calculate that they will
need $21,200.00 by the time Isabelle turns 18.
To find - How much should they deposit every month so that they reach
their goal.
Proof -
We know the formula -
Future value =![PMT\frac{(1 + i)^{n} - 1 }{i}](/tpl/images/1197/9117/905f2.png)
Here , we have
i =![\frac{\frac{3.79}{100} }{12} = \frac{{0.0379} }{12}](/tpl/images/1197/9117/8a356.png)
n = 12×(18 - 5) = 156
Future value = 21,200.00
∴ we get
21,200.00 =![PMT\frac{(1 + \frac{0.0379}{12} )^{156} - 1 }{\frac{0.0379}{12} }](/tpl/images/1197/9117/260f3.png)
⇒21,200 =![PMT\frac{(1 + 0.00315834 )^{156} - 1 }{0.00315834 }](/tpl/images/1197/9117/1b9e2.png)
⇒21,200 =![PMT\frac{(1.00315834 )^{156} - 1 }{0.00315834 }](/tpl/images/1197/9117/28d67.png)
⇒21,200 =![PMT\frac{1.635460826 - 1 }{0.00315834 }](/tpl/images/1197/9117/580c9.png)
⇒21,200 =![PMT\frac{0.635460826}{0.00315834 }](/tpl/images/1197/9117/b996e.png)
⇒21,200 = PMT(201.2008924)
⇒PMT =![\frac{21,200}{201.2008924}](/tpl/images/1197/9117/8fd6f.png)
⇒PMT = 105.3673259 ≈ $105
∴ we get
They should deposit $105 every month so that they reach their goal.
Ответ:
A.)
Explanation: INsert icons