Benjamin is making bow ties. how many 1/2 yard long bow ties can he make if he has 18 feet of fabric

Can someone me with these two circle theorem questions asap?

The function show two sisters' savings account and the rate at which they plan to deposit money

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