It takes ms. linden 45 minutes to shovel her driveway. if her two teenage children her, about how long would it take the three of them to shovel the driveway?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

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

The room above is shaped like a rectangle and has a perimeter of 34 feet. if the room is 11 feet long, how wide is it?