What is the area of this figure? 49.5 in² 66.5 in² 84 in² 91 in²

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

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

Which will form a composite function?