Either is acceptable. Sound professionals tend to write "mic", though they pronounce it "mike". Outside the audio industry, "mike" is rather more common.
This saying, usually phrased as: When you open a book, you open a door, means that reading introduces you to new ideas; the more (and more widely) you read, the more knowledge you'll have. And it's...
The four Major tournaments, also incorrectly called the Grand Slams, are the most important tennis events of the year in terms of world ranking points, tradition, prize-money awarded, and public...