Atree casts a shadow x = 100 ft long when a vertical rod 6.0 ft high casts a shadow 4.0 ft long. how tall is the tree? (round your answer using the rules for working with measurements.)

You need to set up a proportion first, so x/100=6/4 solve for the proportion 100 times 6 equals 600 , then 4 times x equals 4x. Divided by 600 by 4 which is 150. So  your answer is going to be that  the tree is 150 feet tall :D.

Are you trying to figure out the volume?

The answer to your question is 2