Final answer:
To represent the number of cookies (c) and marshmallow treats (m) Eleanor needs to sell, we can write the inequality 5c + 2m ≥ 500.
Step-by-step explanation:
To represent the number of cookies (c) and marshmallow treats (m) Eleanor needs to sell, we can write an inequality. She needs to raise at least $500, so the total amount of money she earns from selling cookies and marshmallow treats must be greater than or equal to $500. If she sells cookies for $5 apiece and marshmallow treats for $2 apiece, the inequality can be written as:
5c + 2m ≥ 500
This inequality ensures that Eleanor earns at least $500 from the bake sale.