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musickatia [10]
3 years ago
10

Dale has 2000 dollars to invest. He has a goal to have 5800 in this invest ment in 9 years. At what annual rate compounded conti

nuously will Dale reach his goal?
Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
3 0

Answer:

Dale will reach his goal at an annual rate of 11.83%.

Step-by-step explanation:

The formula for continuos compounding is given by:

A(t) = Pe^{rt}

In which A is the amount after t years, P is the principal(initial amount) and r is the annual rate.

Dale has 2000 dollars to invest.

This means that P = 2000

He has a goal to have 5800 in this invest ment in 9 years.

So A(9) = 5800

At what annual rate compounded continuously will Dale reach his goal?

This is r.

A(t) = Pe^{rt}

5800 = 2000e^{9r}

e^{9r} = \frac{58}{20}

e^{9r} = 2.9

\ln{e^{9r}} = \ln{2.9}

9r = \ln{2.9}

r = \frac{\ln{2.9}}{9}

r = 0.1183

Dale will reach his goal at an annual rate of 11.83%.

lina2011 [118]3 years ago
3 0

Answer:

Annual rate of 12.56%

Step-by-step explanation:

To find the annual rate, we need to use the compound interest formula:

M = Mo * (1+r)^t

where M is the goal value (M = 5800), Mo is the inicial value (Mo = 2000), r is the annual rate we want to find, and t is the number of years (t = 9). Then we can calculate the equation to find the value of r:

5800 = 2000 * (1+r)^9

(1+r)^9 = 5800/2000 = 2.9

1+r = 1.1256

r = 0.1256 = 12.56%

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