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A principal of $4100 is invested at 5.75% interest, compounded annually. How many years will it take to accumulate $6000 or more in the account? (Use the calculator provided if necessary.)Write the smallest possible whole number answer.years

Question

A principal of 4100isinvestedat5.754100 is invested at 5.75% interest, compounded annually. How many years will it take to accumulate 6000 or more in the account? (Use the calculator provided if necessary.)Write the smallest possible whole number answer.years

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Solution

To solve this problem, we can use the formula for compound interest, which is A = P(1 + r/n)^(nt), where:

  • A is the amount of money accumulated after n years, including interest.
  • P is the principal amount (the initial amount of money).
  • r is the annual interest rate (in decimal form).
  • n is the number of times that interest is compounded per year.
  • t is the time the money is invested for in years.

In this case, we are trying to solve for t (time), the formula becomes t = log(A/P) / n * log(1 + r/n).

Given:

  • P = $4100
  • r = 5.75% = 0.0575 (in decimal form)
  • A = $6000
  • n = 1 (since the interest is compounded annually)

Substituting these values into the formula, we get:

t = log(6000/4100) / 1 * log(1 + 0.0575)

Using a calculator to solve this equation, we get t ≈ 7.27 years.

Since the problem asks for the smallest possible whole number of years, we need to round up (since we can't have a fraction of a year). So, it will take 8 years for the account to accumulate $6000 or more.

This problem has been solved

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