Frankie is practicing for a 5-kilometer race. His normal time is 31 minutes 22 seconds. Yesterday it took him only 29 minutes 43 seconds. How much faster was Frankie yesterday than his normal time?

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