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In a company's first year in operation, it made an annual profit of 
$129,000. The profit of the company increased at a constant 
25% per year each year. How much total profit would the company make over the course of its first 8 years of operation, to the nearest whole number?
Answer:

In a company's first year in operation, it made an annual profit of $129,000 \$ 129,000 . The profit of the company increased at a constant 25% 25 \% per year each year. How much total profit would the company make over the course of its first 88 years of operation, to the nearest whole number?\newlineAnswer:

Full solution

Q. In a company's first year in operation, it made an annual profit of $129,000 \$ 129,000 . The profit of the company increased at a constant 25% 25 \% per year each year. How much total profit would the company make over the course of its first 88 years of operation, to the nearest whole number?\newlineAnswer:
  1. Determine initial profit and rate: Determine the initial profit and the annual increase rate.\newlineThe initial profit is $129,000\$129,000, and the profit increases by 25%25\% each year.
  2. Calculate profit for each year: Calculate the profit for each year using the formula for compound interest, which is P=P0×(1+r)nP = P_0 \times (1 + r)^n, where P0P_0 is the initial amount, rr is the rate of increase, and nn is the number of years.\newlineFor the first year, the profit is $129,000\$129,000.
  3. Calculate profit for second year: Calculate the profit for the second year.\newlineThe profit for the second year would be $129,000×(1+0.25)=$129,000×1.25\$129,000 \times (1 + 0.25) = \$129,000 \times 1.25.
  4. Perform calculation for second year: Perform the calculation for the second year.$129,000×1.25=$161,250.\$129,000 \times 1.25 = \$161,250.
  5. Calculate profit for subsequent years: Continue this process to calculate the profit for each subsequent year up to the eighth year. We will use the formula P=P0×(1+r)nP = P_0 \times (1 + r)^n for each year, incrementing nn by 11 each time.
  6. Calculate total profit over 88 years: Calculate the total profit over the 88 years by adding the profit of each year.\newlineThis requires calculating the profit for each year and then summing them up.
  7. Use loop or summation formula: Use a loop or a summation formula to calculate the total profit. Since this is a geometric series, we can use the formula for the sum of a geometric series, which is S=P0×[1(1+r)n1(1+r)]S = P_0 \times \left[\frac{1 - (1 + r)^n}{1 - (1 + r)}\right], where SS is the sum, P0P_0 is the initial amount, rr is the rate of increase, and nn is the number of terms.
  8. Substitute values into formula: Substitute the values into the formula to find the total profit. S=$129,000×[1(1+0.25)81(1+0.25)]S = \$129,000 \times \left[\frac{1 - (1 + 0.25)^8}{1 - (1 + 0.25)}\right].
  9. Perform calculation: Perform the calculation.\newlineS=$129,000×[(11.258)(11.25)]S = \$129,000 \times \left[\frac{(1 - 1.25^8)}{(1 - 1.25)}\right].
  10. Calculate sum using calculator: Calculate the sum using a calculator or software to ensure accuracy.\newlineS=$129,000×[(11.258)(0.25)]S = \$129,000 \times \left[\frac{(1 - 1.25^8)}{(-0.25)}\right].
  11. Calculate value of 1.2581.25^8: Calculate the value of 1.2581.25^8.\newline1.258=5.9604644775390631.25^8 = 5.960464477539063.
  12. Substitute value into sum formula: Substitute this value into the sum formula.\newlineS=$129,000×[(15.960464477539063)(0.25)]S = \$129,000 \times \left[\frac{(1 - 5.960464477539063)}{(-0.25)}\right].
  13. Calculate numerator of fraction: Calculate the numerator of the fraction. 15.960464477539063=4.9604644775390631 - 5.960464477539063 = -4.960464477539063.
  14. Calculate total sum: Calculate the total sum.\newlineS=$129,000×[4.9604644775390630.25]S = \$129,000 \times \left[\frac{-4.960464477539063}{-0.25}\right].
  15. Perform final calculation: Perform the final calculation.\newlineS=$129,000×19.84185791015625.S = \$129,000 \times 19.84185791015625.
  16. Calculate total profit: Calculate the total profit to the nearest whole number.\newlineS$(129,000×19.84185791015625)$2,559,599.57S \approx \$(129,000 \times 19.84185791015625) \approx \$2,559,599.57.

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