Final answer:
The solution set of the inequality '13 ≤ c - 4' is found by adding 4 to both sides, resulting in the inequality '17 ≤ c'. Hence, the correct solution is 'c ≥ 17' (option c).
Step-by-step explanation:
To find the solution set of the inequality 13 ≤ c - 4, we need to isolate the variable c on one side of the inequality. This is accomplished by performing the same operation on both sides of the inequality. Adding 4 to both sides, we get:
13 + 4 ≤ c - 4 + 4
Which simplifies to:
17 ≤ c
This means the variable c must be greater than or equal to 17. Therefore, the correct solution set for the inequality is:
c ≥ 17
Matching this to the provided answer choices, the correct one is:
(c) c ≥ 17