A farmer, worried about his fruit trees suffering frost damage, calls the weather service for temperature information. He is told that temperatures will be decreasing approximately $4^{∘}$ every hour for the next 4 hours. What signed number represents the total change in temperature expected over the next 4 hours? ________${}^{∘}$

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The Answer of A farmer, worried about his fruit trees suffering frost damage, calls the weather service for temperature information. He is told that temperatures will be decreasing approximately $4^{∘}$ every hour for the next 4 hours. What signed number represents the total change in temperature expected over the next 4 hours? ________${}^{∘}$

A Farmer, Worried About His Fruit Trees Suffering Frost Damage 4∘4^{∘}4∘

A Farmer, Worried About His Fruit Trees Suffering Frost Damage $4^{∘}$