|
Question 1175755: A tracking device that is installed in a mobile phone indicates that its user is located at a point whose coordinates are (18,14). In the tracking device, each unit on the grid is equivalent to 7km. If the phone user came from a place whose coordinates are (2,6), how far has he travelled?
Answer by ikleyn(52781)   (Show Source):
You can put this solution on YOUR website! .
A tracking device that is installed in a mobile phone indicates that its user is located at a point
whose coordinates are (18,14). In the tracking device, each unit on the grid is equivalent to 7km.
If the phone user came from a place whose coordinates are (2,6), how far has he travelled?
~~~~~~~~~~~~~
On the tracking device, the displacement vector is (16,8)
(16 = 18-2 units in x-coordinate and 8 = 14-6 units in y-coordinate).
So, the traveled distance in this scale is  =  = 17.889 units.
With the scale factor 7 kilometers to one unit, the real distance is 7*17.889 = 125.22 kilometers. ANSWER
Solved, answered and explained. And completed.
|
|
|
| |
