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Nana76 [90]
3 years ago
10

Bob wants $50,000 at the end of 7 years in order to buy a car. if his bank pays 4.2% interest, compounded annually, how much mus

t he deposit each year in order to reach his goal?
Mathematics
2 answers:
madam [21]3 years ago
5 0

Answer:

Amount deposit each year in order to reach his goal is $6292.16.

Step-by-step explanation:

Given : Bob wants $50,000 at the end of 7 years in order to buy a car. if his bank pays 4.2% interest, compounded annually.

To find : How much must he deposit each year in order to reach his goal?

Solution :

We apply the present value formula to get the amount,

P=\frac{FV\times(\frac{r}{n})}{(1+\frac{r}{n})^{nt}-1}  

Where, P is the periodic payment

r is the rate r=4.2%=0.042

n is the number of periods per year n=1

t is the time t=7 years

FV is the future value FV=50,000

Substitute in the formula,

P=\frac{50000\times(\frac{0.042}{1})}{(1+\frac{0.042}{1})^{1(7)}-1}  

P=\frac{50000\times 0.042}{(1+0.042)^{7}-1}  

P=\frac{2100}{(1.042)^{7}-1}  

P=\frac{2100}{1.3337-1}  

P=\frac{2100}{0.3337}  

P=6292.16  

Therefore, Amount deposit each year in order to reach his goal is $6292.16.

Furkat [3]3 years ago
4 0
<span>The correct answer is $1452.50 per year.

Explanation:<span>
We use the formula
</span></span>P(1+\frac{r}{n})^{nt}+PMT(\frac{[(1+\frac{r}{n})^{nt}-1]}{\frac{r}{n}})\times (1+\frac{r}{n}),<span><span>

where P is the amount of principal invested, r is the interest rate as a decimal number, n is the number of times per year the interest is compounded, PMT is the monthly deposit added, and t is the number of years.

Since the amount of principal is not stated, we will assume that Bob is depositing the same amount every following year as he does the first year, so we will let PMT=P.

Our interest rate, r, is 4.2%; 4.2%=4.2/100=0.042.

The number of times the interest is compounded annually, n, is 1.
The amount of time, t, is 7.

We know he wants $50,000. This gives us the equation
50000=P(1+0.042/1)</span></span>⁽¹ˣ⁷⁾<span><span>+P{[(1+0.042/1)</span></span>⁽¹ˣ⁷⁾<span><span>]/(0.042/1)}*(1+0.042/1).

Simplifying this a bit, we have
50000=P(1.042)</span></span>⁷<span><span>+P((1.042</span></span>⁷<span><span>)/0.042)*(1.042).

We can factor out P, giving us
50000=P[1.042</span></span>⁷<span><span>+((1.042</span></span>⁷<span><span>)/0.042)*1.042].

This then gives us
50000=P(34.4234).

Divide both sides:
50000/34.4234 = (P(34.4234))/34.4234,

which gives us P=1452.50.</span></span>
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