Mathematics, 01.10.2019 22:30, peytontanner

Two brothers leave from the same point driving in opposite directions, the first brother driving at 60 miles per hour and the second at 65 mph. the first brother has a one-hour head start. if each brother has a communication device that allows him to talk to the other for up to a 200-mile range, how long will they be able to talk to each other?

the communication devices will be out of range __ hours after the first brother left.

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Two brothers leave from the same point driving in opposite directions, the first brother driving at...