Answer:
1.6125 quart is required.
Explanation:
It is given that a recipe for blueberry smoothies calls for 6 cups of yogurt and 1 cup of yogurt weighs 8.6 ounces.
1 cup = 8.6 ounces
The weight of yogurt for 6 cups is

Total yogurt required for the recipe = 51.6 ounces
We know that
1 quart = 32 ounces
Using this conversion we get
1 ounce =
quart
51.6 ounce =
quart
Therefore, 1.6125 quart is required.