2 points A cyclist rode 2.5 miles in 0.4 hours. How fast was the cyclist going in
miles per hour?
The cyclist was going 10 miles per hour.
The cyclist was going 6.25 miles per hour.
The cyclist was going 2.9 miles per hour.
The cyclist was going 2.1 miles per hour.

How do i do this activity, is appreciated

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

I’m really confused and need your assist me with this question i’ve never been taught