Neptune

6163.2

30.83333333333

Decimal to Fraction: Step 1: Write down the decimal divided by 1, like this: decimal 1. Step 2: Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.) Step 3: Simplify (or reduce) the fraction. 

Decimal to Percent: To convert a decimal to a percent, multiply the decimal by 100, then add on the % symbol. An easy way to multiply a decimal by 100 is to move the decimal point two places to the right. This is done in the example below. Each decimal in Example 1 went out two places to the right of the decimal point.

Accessory meaning: a thing that can be added to something else in order to make it more useful, versatile, or attractive. 

The first electronic device was the relay, a remote switch controlled by electricity. It made modern telegraphy possible and evolved into the repeater- thus the relay- a remote controlled switch, was in effect the first ( Electronic) device, though not anything involving crystals, diodes, vacuum tubes etc. The first invented Relay was used as part of his telegraph system circa 1844. 

https://en.wikipedia.org/wiki/History_of_technology for the first two questions of yours

13 1/2.

Approximately 8.660254037844387

It takes Deep Thought, the supercomputer 7½ million years to compute and check the answer, which turns out to be 42. Deep Thought points out that the answer seems meaningless because the beings who instructed it never actually knew what the Ultimate Question was in the first place. So many years of computing and the answer is some arbitrary number. How could it be?? There must be some meaning for the Number! Turns out it was a joke. 

Many theories were proposed, including that 42 is 101010 in binary code, that light refracts off water by 42 degrees to create a rainbow, that light requires 10−42 seconds to cross the diameter of a proton. The author Douglas Adams rejected them all. He was quoted as saying - "The answer to this is very simple. It was a joke. It had to be a number, an ordinary, smallish number, and I chose that one. Binary representations, base 13, Tibetan monks are all complete nonsense. I sat at my desk, stared into the garden and thought '42 will do'. I typed it out. End of story."

7.71618

hoi!

11 + 11 = 22 

11 + 1 = 12