Final answer:
To determine the amount of kernels Serena uses per cup of popcorn, you would need to know the ratio she uses when making popcorn. Without specific information about the ratio Serena uses, it is not possible to determine the exact amount of kernels she uses per cup of popcorn.
Step-by-step explanation:
To determine the amount of kernels Serena uses per cup of popcorn, you would need to know the ratio she uses when making popcorn. The ratio is the relationship between the amount of kernels and the amount of popped popcorn. For example, if Serena uses 1/4 cup of kernels to make 4 cups of popcorn, then for 1 cup of popcorn, she would use 1/16 cup of kernels.
It's important to note that the amount of kernels required may vary depending on the brand of popcorn and personal preferences. Additionally, factors such as the size of the kernels and the method of popping (microwave, stove, air popper) can also affect the ratio.
Therefore, without specific information about the ratio Serena uses, it is not possible to determine the exact amount of kernels she uses per cup of popcorn.