calculate to the nearest mile the distance between
P(26 degrees north,70 degrees west), Q(72 degrees S, 70 degrees W)
R(o degrees,50 degrees East), S(o degrees, 32 East) along the equator.
A ship leavers rio at midday and sails south at a steady 15 knots.
What are the co-ordinates od the ship at 2000 hours.
If it continues on the same bearing at the same speed what time should it reach its co-ordinates (28degrees south, 43 degrees West)
discuss your solutions the mathematical models that enable these calculations to be made and the crediibilty you can give their accuracy.