Which has the greatest kinetic energy? Baseball flying at 20 mph, baseball flying at 90 mph, baseball sitting on ground, or baseball flying at45 mph

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

Ithink that’s it’s b

Muscle fiber i think that i right