Final answer:
The subject of this question is Chemistry. Sean uses 1/2 cup of coconut oil to make 2/3 cup of toothpaste. The proportion of coconut oil to toothpaste is 3 parts to 4 parts.
Step-by-step explanation:
Sean mixes coconut oil with several other ingredients to make homemade toothpaste for his dog Rocky. He uses 1/2 cup of coconut oil to make 2/3 cup of toothpaste.
The subject of this question is Chemistry, as it involves the mixing of ingredients to create a toothpaste.
To make 2/3 cup of toothpaste, Sean uses 1/2 cup of coconut oil. This means that the proportion of coconut oil to toothpaste is 1/2 to 2/3, or 3 parts to 4 parts.
By using this ratio, Sean can determine the amount of toothpaste that can be made from any given amount of coconut oil.