\(\dfrac{1}{5}+\dfrac{1}{5^2}+\dfrac{1}{5^3}+......+\dfrac{1}{5^{10}}\)

= \(\dfrac{1}{5}\left(1+\dfrac{1}{5}+\dfrac{1}{5^2}+....+\dfrac{1}{5^9}\right)\)

= \(\left[\left(1+\dfrac{1}{5}+\dfrac{1}{5^2}+....+\dfrac{1}{5^9}\right)-\left(\dfrac{1}{5}+\dfrac{1}{5^2}+....+\dfrac{1}{5^{10}}\right)\right]\) : 4

= \(\left(1-\dfrac{1}{10}\right):4\)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Question 13. He sent his children to the park so that he could have some ______.

A. fresh and quiet

B. quiet and peace

C. peace and quiet

D. fresh and peace