After 3 months of living at his new house, tony had 4 birds. four months later, tony still had 4 birds. which graph models tony's bird population?

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Which of the following is the shape of a cross section of the figure shown below

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details