Mathematics, 20.10.2021 14:00 hallmansean04

15. Sam wanted to know how much the price of milk had changed over the last few decades. He

found that the price of a gallon of milk was $0.80 in 1970 and in 1990 it was $1.20. What

was the average rate of change in a gallon of milk per year?

Do not enter $ in your answer. Make sure to include a negative sign if annlicable

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