Mia and melody made 38 bird feeders in 4 hours. the next day, they had more and made 28 more bird feeders in the same amount of time. what was their rate on the second day?
a. 16.5 bird feeders per hour
b. 9.5 bird feeders per hour
c. 8.25 bird feeders per hour
d. 7 bird feeders per hour

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