Answer:
it is at 4 meters
Step-by-step explanation:
20 - 16 = 4
Hope this helps!
Maybe brainliest?
x + 4/3x^3
y=1/2x^2-2/3x^-2
dy/dx=1/2(2x)-2/3(-2x^-3)
=x+4/3 x^-3
=x+4/3x^3
all work is shown and pictured
