Step 1: Flip the equation: 1/2 gw=d
Step 2: Divide both sides by w/2
You would get the answer like this: g=2d/w
The derivative of
in the direction of a vector
is

With
, we get

and
,

Then

Double of 50 is 100, so 28*100=2800, now half of the answer is 2800/2=1400
Answer:
drawing a blue marble is a harder then the yellow but not as hard as the red.