What’s the surface area AND volume of this shape?

Answer question above and explain each step : )

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class