One value: would be a single valued function, or just one answer.
Real numbers would be: natural numbers, whole numbers, integers, rational numbers (fractions and repeating or terminating decimals), and irrational numbers.
No solution: there is no answer to the question.
Answer:
56
Step-by-step explanation:
Factors of 39: 1, 3, 13, 39.
39+13+3+1=
39+4=43
43+13=58
D would be the right answer
Assuming that I earn 4% of $2,500 per year, I would earn $800 after 8 years.