Marco and Antony are practicing football. They start at the 50 yard line, and Antony heads out for a pass, running at 5 yards per second. Two seconds after Antony heads out, Marco throws the football straight towards him, and it travels horizontally at an average speed of 9 yards per second until it reaches Antony. How long in seconds after Marco throws the football does Antony catch it, assuming that he catches it?

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