What are dex files in android smartphone and what are they used for?

Which of the following is true about artist during the renaissance?

Which scientist listed below is not one of those to advance the study of mathematics? a. euclid b. herodotus c. pythagoras d. archimedes

Now for all my fellow anime lovers i have 4 questions: 1. which ship would have been the best ending for inuyasha a) inuyasha x kagome b) sesshomaru x kogome c) koga x kagome d) none 2. what is your ideal ending for fairy tail 3. which show wouldn't you mind watching or rewatching a) ghost hunt b) psycho pass c) inuyahsa d) the wallflower e) pick your own 4. what is the anime show you that you would love to live in for a year?