Question

I need help on this.

Answer 1

3, because if it only makes 10 cupcakes, you need to triple it (i.e. 10*3=30); (Assuming it was 1 cup oil) 3 cups vegetable oil; 3 cups flour; the difference is 2 teaspoons; (Assuming it was 1 teaspoon salt) the difference is 2 teaspoons; It would make sense to round the bananas because "medium-sized bananas" depends on your personal opinion, which means it's already rounded and further rounding wouldn't hurt as long as you're careful.

Answer 2

Answer:

Here we have a recipe that works for 10 serves.

Then, if we want to make 30 servings, we need to use that recipe 3 times. (because x*10 = 30, then x = 30/10 = 3)

This would be equivalent to multiply each ingredient by 3.

for 30 cupcakes we need:

3 cups of vegetable oil.

3 cups of all-purpose flour

(because for each one of these ingredients we needed only 1 cup to make 10 cupcakes).

for 10 cupcakes we need 1 teaspoon of vanilla.

for 30 cupcakes we need 3 teaspoons of vanilla, the difference is 3 - 1 = 2.

So the difference is 2 teaspoons.

About which quantities we should round are those where we may have mixed numbers or big numbers.

For example, we have 4 tablespoons of sour cream for 10 servings, then for 30 servings we should have:

3*4 = 12 tablespoons.

We could round this down to 10 tablespoons.