An airport wishes to send out a rescue crew. Which direction and how far should this crew fly to go directly to a plane which made an emergency landing if the condition is this: the craft left the airport in Cebu and flew 170 km at 68 degrees east of north and then changed direction to fly 230 km at 48 degrees south of east, after which it made an immediate emergency landing in a pasture?

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Q: really need

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.