Final answer:
The r-values that satisfy the inequality r/3 ≤ 8 are r ≤ 24.
Step-by-step explanation:
The r-values that satisfy the inequality r/3 ≤ 8 can be found by multiplying both sides of the inequality by 3 to eliminate the fraction. This gives us r ≤ 24.
Therefore, the correct answer is option A: r ≤ 24.