Final answer:
Janet Harris ate 7,175 peas in 60 minutes, making it 119.58 peas per minute. Multiplying by 90 minutes gives us 10,762.5 peas. So, she ate 10,762.5 peas in 90 minutes.
Step-by-step explanation:
To calculate the number of peas Janet Harris ate in 90 minutes given the number of peas she ate in 60 minutes. She ate 7,175 peas in 1 hour (60 minutes), so first we need to find out how many peas she eats per minute.
Peas per minute = Total peas eaten in 1 hour / Number of minutes in an hour
Peas per minute = 7,175 peas / 60 minutes
Peas per minute = 119.58 peas
Now, we can find out how many peas she eats in 90 minutes by multiplying the number of peas per minute by 90.
Total peas in 90 minutes = Peas per minute * 90 minutes
Total peas in 90 minutes = 119.58 peas * 90 minutes
Total peas in 90 minutes = 10,762.5 peas
Therefore, Janet Harris ate 10,762.5 peas in 90 minutes, which corresponds to answer choice C.