Final answer:
To find the shortest distance from a point to a line, first find the equation of the line and then substitute it into the distance formula.
Step-by-step explanation:
To find the shortest distance from the point P=(1.6,-5) to a point on the line given by (x, y, z)=(4t, 4t, 4t), we can first find the equation of the line passing through both points. The equation is x = 4t, y = 4t, z = 4t. Then, we can substitute these equations into the distance formula d = sqrt((x-1.6)^2 + (y+5)^2 + z^2) and simplify to find the shortest distance.