Let's go through each question one by one:
1. When marginal utility is decreasing but positive, total utility is:
Answer: B. decreasing at a decreasing rate
2. An indifference curve shows combinations of two goods that:
Answer: D. would provide the consumer with the same level of satisfaction
3. Ordinal utility analysis is otherwise known as:
Answer: C. Indifference curve analysis
4. Total utility is maximum when:
Answer: A. Marginal utility is zero
5. When Total utility is increasing at a decreasing rate, marginal utility is:
Answer: D. Decreasing
6. A consumer reaches equilibrium when:
Answer: A. Marginal utility is equal to price