Which of the following best estimates the number of stars in a galaxy a- millions b-billions c-hundreds d-thousands

Easily billions. The Milky Way Galaxy (the one we live in) has between 200 and 400 billion stars. The answer is B-Billions. Hope that helps! Mark Brainliest if it does. Thank you!

dz nuts.   eeneneneeenenne

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.