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Find the value of the following expression and round to the nearest integer:

sum_(n=0)^(66)300(0.95)^(n+1)
Answer:

Find the value of the following expression and round to the nearest integer:\newlinen=066300(0.95)n+1 \sum_{n=0}^{66} 300(0.95)^{n+1} \newlineAnswer:

Full solution

Q. Find the value of the following expression and round to the nearest integer:\newlinen=066300(0.95)n+1 \sum_{n=0}^{66} 300(0.95)^{n+1} \newlineAnswer:
  1. Given series information: We are given a geometric series with the first term a=300×0.95a = 300 \times 0.95 and the common ratio r=0.95r = 0.95. The sum of a finite geometric series can be found using the formula Sn=a(1rn)(1r)S_n = \frac{a(1 - r^n)}{(1 - r)}, where nn is the number of terms. In this case, we have 6767 terms (from n=0n=0 to n=66n=66).
  2. Calculate first term: First, calculate the first term of the series: a=300×0.95a = 300 \times 0.95.
  3. Calculate 6767th power of common ratio: Now, calculate the 6767th power of the common ratio: r67=0.9567r^{67} = 0.95^{67}. This will be used in the formula for the sum of the series.
  4. Substitute values into sum formula: Substitute the values of aa, rr, and nn into the sum formula: S67=300×0.95×(10.9567)/(10.95)S_{67} = 300 \times 0.95 \times (1 - 0.95^{67}) / (1 - 0.95).
  5. Calculate numerator of fraction: Calculate the numerator of the fraction: 10.95671 - 0.95^{67}. This requires a calculator for an accurate result.
  6. Calculate denominator of fraction: Calculate the denominator of the fraction: 10.951 - 0.95. This is straightforward and equals 0.050.05.
  7. Divide numerator by denominator: Divide the numerator by the denominator to find the sum of the series: S67=300×0.95×(10.9567)/0.05S_{67} = 300 \times 0.95 \times (1 - 0.95^{67}) / 0.05.
  8. Round to nearest integer: Finally, round the result to the nearest integer to get the final answer.

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