In recent year a letter to europe from the united states cost $0.94 to mail. a letter mailed within united states cost $0.44. nancy mailed 5 letters for $3.70 some to europe and some to the united states. how many letters did she send to europe

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