I came up with 1.3 hours.. Not sure if that's right but it would make sense. How did you figure it?
Answer:

Step-by-step explanation:
The expression
can be simplified using rules for negative exponents - move the base to the denominator. After following this rule, simplify.

Complete Question:
Write an equation that represents the relationship between <FCB and <GBC
Answer:
m<FCB = m<GBC
Step-by-step explanation:
Given that GE is parallel to HF, and AD crosses both, thus:
<FCB and <GBC are alternate interior angles.
Alternate interior angles are congruent.
Therefore, the equation that represents the relationship between <FCB and <GBC would be:
m<FCB = m<GBC