Two planes take off from the same airport at the same time using different runways. one plane travels on a bearing upper s 14 degrees upper w at 440 miles per hour. the other plane travels on a bearing upper n 75 degrees upper w at 420 miles per hour. how far are the planes from each other 3 hours after takeoff?

 Let's imagine this is the diagram for the question,

                 •    

3*440=       /  |

               /     |

1320mi  ↑       |

           ↑         ↓

          /           ↓

        /             |

      • ) 89⁰     |

       \              |   "x" miles

         \            ↑

           \          ↑

            ↓         |

              ↓       |      

3*420=      \     |

1260 mi      \   |

                        •

From the Cosine Rule:  x² = y² + z² - 2 y z cos X⁰

x² = 1320² + 1260² - 2 * 1320 * 1260 * cos 89⁰ =  

1742400 + 1587600 - 3326400 * cos 89⁰ = 3271946315  

x ≈ 1809 mi

Hence, the planes are 1809 miles from each other 3 hours after takeoff?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.