At the movies are on byes popcorn for 525 and a bottle of water for 250 he pays with a $10 bill how much change should i run for speed

Can someone me with my hwplz(only the circled ones)

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

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