Out of 500 milliliters of hydrochloric acid, 237 milliliters were left after an experiment that used the acid. How much acid was used in the experiment? A. 156 ml B. 189 ml C. 263 ml D. 307 ml

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