Answer:
They are not parallel.
Put the equation in y=mx=b format to compare. The first equation (y=4x-4) is already in the right format.
If m (slope) is the same, then the lines are parallel.
-4y=96-24x
/-4 all sides
y= - 24+ 6x
y=6x-24
y=4x-4
6 is not equal to 4, slopes are not the same. Not parallel.
1. Check the sketch of the problem.
2. In right triangle DCE,

tan 50 can be found to be 1.19 using a scientific calculator or other software.

x=1.19*50=59.5 (feet)
3. The height of the building is 59.5+5=64.5 (feet)
Answer: 64.5 (feet)