If a seed is planted, it has a 90% chance of growing into a healthy plant. If 11 seeds are planted, what is the probability that exactly 2 don't grow? (round to 4 decimal places)

I really need help with this. Could someone please explain even the basics? I am very confused by the formula and how to enter on a calculator.

I'm confused on this could anyone me and show me what i need to do to solve it.

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

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25