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Sinichi has invested $56,000 for 8 years. The investment pays interest at 12 per annum, compound quarterly. Find the amount of money in the account after 8 years and find the total amount of interest he earned

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Final answer:

The amount of money in the account after 8 years is approximately $118,612.62. The total amount of interest earned is approximately $62,612.62.

Step-by-step explanation:

To calculate the amount of money in the account after 8 years, we can use the compound interest formula:

A = P(1 + r/n)^(nt)

Where:

  • A is the amount of money in the account after t years
  • P is the principal amount (initial investment)
  • r is the annual interest rate (decimal)
  • n is the number of times interest is compounded per year
  • t is the number of years

For this question:

  • P = $56,000
  • r = 12% or 0.12
  • n = 4 (quarterly compound interest)
  • t = 8 years

Plugging these values into the formula:

A = 56000(1 + 0.12/4)^(4*8)

Calculating this, the amount of money in the account after 8 years is approximately $118,612.62.

To find the total amount of interest earned, we can subtract the initial principal amount:

Total interest = A - P

Total interest = $118,612.62 - $56,000

Total interest = approximately $62,612.62.

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