There are 12 girls and 8 boys in ms. sander’s class. each day, she randomly asks one student to take attendance. in 180 school days, which is the best prediction for the number of times that the student will be a girl?

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

Me with these questions , i don’t understand scientific notation!

Which is an example of using the distributive property to multiply -5x^3(3x^2+3x-1) ?