If you deposited some money into an account where the interest rate was 6% compounded continuously, how long would it take for the amount in the account to triple?

Which of the following equations could you use to solve for the number of years?

(There are 4 correct answers. Identify all)

A. 300=100e^0.06t
B. 27=3e^0.06t
C. 1=e^0.06t
D. 180=60e^0.06t
E. 45=15e^0.06t
F. 3=e^0.06t

Respuesta :

Using the equation of continuous compounding, the correct options are: A, D, E and F, and that it will take 18.31 years for the amount to triple.

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The amount of money, in continuous compounding, after t years, is given by:

[tex]A(t) = A(0)e^{kt}[/tex]

In which

  • A(0) is the initial amount.
  • k is the interest rate.

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  • Interest rate of 6% means that [tex]k = 0.06[/tex], and thus:

[tex]A(t) = A(0)e^{0.06t}[/tex]

  • The amount will triple when:

[tex]A(t) = 3A(0)[/tex]

Thus:

[tex]A(t) = A(0)e^{0.06t}[/tex]

[tex]3A(0) = A(0)e^{0.06t}[/tex]

[tex]3 = e^{0.06t}[/tex]

Which is option F. Additionally, options A, D and E can be simplified to this equation, thus, they are the correct options.

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  • Solving for t, we find the time needed, thus:

[tex]e^{0.06t} = 3[/tex]

[tex]\ln{e^{0.06t}} = \ln{3}[/tex]

[tex]0.06t = \ln{3}[/tex]

[tex]t = \frac{\ln{3}}{0.06}[/tex]

[tex]t = 18.31[/tex]

It will take 18.31 years for the amount to triple.

A similar problem, is given at https://brainly.com/question/15953707