Nancy was reviewing the water bill for her dog day care and spa and determined that her highest bill, $3,800, occurred in May when she washed 400 dogs and her lowest bill, $2,400, occurred in November when she washed 200 dogs. What was the variable cost per dog associated with Nancy's water bill?

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The Answer of Nancy was reviewing the water bill for her dog day care and spa and determined that her highest bill, $3,800, occurred in May when she washed 400 dogs and her lowest bill, $2,400, occurred in November when she washed 200 dogs. What was the variable cost per dog associated with Nancy's water bill?

Nancy Was Reviewing the Water Bill for Her Dog Day