Tom takes exactly 30 minutes to rake a lawn and his son mike takes exactly 60 minutes to rake the same lawn. if tom and mike decide to rake the lawn together, and both work at the same rate that they did previously, how many minutes will it take them rake the lawa. 16 b. 20 c. 36 d. 45 e. 90

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