Simplify this expression: 54 - c + 3c by the power of 2 - 10

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

What percent of 18 is 24? and plz explain thx.

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