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Kobotan [32]
3 years ago
11

What is the square root of -1​

Mathematics
1 answer:
Romashka [77]3 years ago
3 0

Answer:

i

Step-by-step explanation:

Now, before you think I'm just stealing points, let me explain. The square root of a number is the number that, if you multiply it by itself, it equals that number. The square root of 4 is 2, because 2 * 2 = 4.

Also, a negative number times another negative number, is a positive number. -2 * -2 = 4

With both of those true, then what number could be multiplied by itself to equal a negative number? i.

i is a weird number that I don't really know how to explain all that well. I am sorry, but that is all that I can give you. i is very complex and has various different equivalents, and different meanings, but i is equal to \sqrt{-1}.

Hope that this helps!

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Irina-Kira [14]

Answer:

  Cassie is traveling 63.6 mph

Step-by-step explanation:

If the three numbers, left to right, are A, B, C, then the tire radius in millimeters is ...

  A×B/100 + 12.7×C

For the factory tires, the tire radius is ...

  240·75/100 + 12.7·16 = 180 +203.2 = 383.2 . . . . millimeters

For the replacement tires, the tire radius is ...

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The speedometer is calibrated based on the number of revolutions the tire makes in a given time period. If the truck goes farther for each revolution, its speed is higher by the same proportion.

If the speedometer on the truck with these replacement tires reads 60 mph, the actual speed is ...

  (406.2/383.2)×60 mph = 63.6 mph

_____

<em>Comment on the problem statement</em>

<u>Caroline</u>'s truck has the replacement tires. If <u>Cassie</u>'s speedometer reads 60 mph, we have no reason to assume Cassie is traveling at any speed other than 60 mph.

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