"Due to its lack of international and domestic conflict as well as its low crime rate, the Global Peace Index in 2016 ranks the Czech Republic as the sixth safest place to live on earth."
http://thefactfile.org/czech-republic-facts/
Answer:
Let's take a look at the modern day headphones we have now. They're airpods. Wirless. It used to be connected to wires. And those earbuds used to be headphones. And those headphones used to be heavy speakers.
Explanation:
How did they evolve with growth in technology? Back in the early 1890s, headphones were single-sided, heavy speakers that people would hold on to an ear to communicate. This later evolved into something known as an 'Electrophone'. It was a system consisting of a stethoscope-shaped headphone connected to a switchboard.
We started using them in the wars to communicate with the troops on the ground and now we use them to stay focused, to disappear and to give ourselves some time away from the stressful world we live in.
Answer:
a.6√3
Explanation:
basically all you're doing is multiply and dividing