The number of soil samples, s, that Sonal needs for an experiment must be greater than 6 but less than or equal to 13. Which of the following represents an acceptable number of soil samples for Sonal's experiment?
A. 6 < s < 13
B. 6 ≤ s < 13
C. 6 < s ≤ 13
D. 6 ≤ s ≤ 13
Answer:C
The number of soil samples, s, that Sonal needs for an experiment must be greater than 6 but less than or equal to 13. Which of the following represents an acceptable number of soil samples for Sonal's experiment?
A. 6 < s < 13 B. 6 ≤ s < 13 C. 6 < s ≤ 13 D. 6 ≤ s ≤ 13
Explanation: C Sonal needs s soil samples. If according to the question, he must have more than 6 samples, then s > 6. Also according to the question, he may have no more than 13 samples, so s ≤ 13. Combining these two expressions, we find that 6 < s ≤ 13. This is (C).