Which of the following best describes the protocol used on the internet?

The protocols of the Internet are open and used by all devices connected to the network

Explanation:  

There are billions of devices connected to the Internet, and hundreds of different kinds of devices: laptops, tablets, phones, refrigerators, handheld credit card readers, and so on. Protocols (standards) ensure that the variety of devices interact with each other smoothly.  There are a lot of protocols! The Internet was designed with several layers of abstraction that sort the protocols according to what part of the process they support.

for this, you need the pythagorean theorem, which is a^{2}+ b^{2}= c^{2}

your a should be 12, and your b should be 35. so now you can solve for c, which equals 37 miles.

so the answer is 37 miles