Final answer:
Talia should buy either 7, 8, or 9 mealworms because the number must be more than 6 and less than 10.
Step-by-step explanation:
The question asks how many mealworms Talia should buy if she is instructed to buy more than 6 but less than 10. Since she needs to buy more than 6, we start counting at 7. Since she needs to buy less than 10, we stop counting at 9. Thus, the possible numbers of mealworms she can buy are 7, 8, or 9.