B. what is a real-world example or use of surface area?

Surface area : It is the total area of a surface

The surface area is used in many places.

1) If we want to paint a wall, we have to find the total surface area of the wall.  

2). If we want to place tiles in our floor we want to find surface area.

3)If we want to roof our houses we have to find the surface area.

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.