Zoe needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 5.5 hours and charged her $143 for parts.
The total was $280.50. What was the cost of labor, per hour?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap