Just put 3.150 lol that what I did
If it took 4 miles per hour you multiply that twice cuss its traveling back then forth so you repeat the same process 30 miles times 2 which is 60 hope this helps.
Let's say the point is (x,y) and it lies in 1st quadrant with both x and y as positive ,
Now let's say that the point is rotated by 270 degrees counter clockwise
It means The point will shift to the 4th quadrant , and we know that in 4th quadrant , the x is positive and y is negative ,
Also , as it is rotated by 270 degrees , the x and y values will interchange
SO there are two steps
1) Change the sign of x
2) Interchange the x and y values , i.e swap , x with y and y with x
