20pts for valid answer

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

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

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters