What is the probability that at least one of them is green

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

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

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges