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How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

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

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.