) The total cost function for a product is C(x) = 775ln(x + 10) + 1600 Where x is the number of units produced. a) Find the total cost of producing 400 units. (Round to the nearest cent) b) Producing how many units will give total costs of $7500? (Round to the nearest whole number)

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