Answer: 7.5 pounds of chocolate are needed to make 48 signature chocolate muffins.
Explanation:
Given : The amount of chocolate needs for each muffin = 2.5 ounces
Then , the amount of chocolate needs for 48 muffins will be :-

Since ,

Then ,

Then , the amount of chocolate are needed to make 48 signature chocolate muffins (in pounds) will be :-

Hence, 7.5 pounds of chocolate are needed to make 48 signature chocolate muffins.