The velocity of a train, measured in meters per second, is described by vector t=(-1,-4). find the direction the train is traveling using standard position

The vector (-1,-4) tells us that the train is moving 1 unit in the negative x-direction while moving 4 units in the negative y-direction. This vector makes an angle theta with the x-axis. We can find theta by using the inverse tan function. tan(theta) = 4/1 theta = inverse tan (4) = 75.96 Note that this is the angle below the x-axis. The angle in standard position must be measured from the positive x-axis, so we need to add 180 degrees. Therefore, the direction of the train in standard position is: 75.96 + 180 which equals 255.96 degrees.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

Ithink the answer is: it is likely.