The average cost of tuition and fees at a public four-year college in the united states can be molded by the following formula where t represents the average cost of tuition and fees for the school year ending x years after 1996. when will tuition and fees at public us colleges average $7556? t=165x+2771

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