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olchik [2.2K]
3 years ago
14

Very confusing, please help

Mathematics
2 answers:
Ksivusya [100]3 years ago
7 0

Answer:

A -2*-2 ≠- 4

Step-by-step explanation:

sqrt(-4)

The answer is an imaginary number

-2*-2 = 4 not -4

kotegsom [21]3 years ago
4 0

Answer:

\sqrt{-4} \neq -2 \\  because -2 times -2 equals 4 not -4.

Therefore A. -2^{2}\neq 4 is the answer to this question.

If you need help on similar problems feel free to ask, hope I helped :)

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Ami and Ria are playing a game where one of them would pick up a card and the other would guess the number. Ami picked up a card
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\huge \boxed{\mathrm{\bold{D.} \ 315}}

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Charlie guesses that his dog weighs 34. 5 pounds. The dog actually weighs 32. 7 pounds. What is the percent error in Charlie’s g
expeople1 [14]

Percent error is the amount of error to actual value, in percent. The percent error in Charlie’s guess is approximately: Option D: 5.5%

<h3>How to calculate the percent error?</h3>

Suppose the actual value and the estimated values after the measurement are obtained. Then we have:

Error = Actual value - Estimated value

To calculate percent error, we will measure how much percent of actual value, the error is, in the estimated value.

\rm Percent \: Error = |\dfrac{Error}{Actual value}|\times 100 \\\\Percent \: Error = | \dfrac{\text{(Actual Value - Estimated Value)}}{Actual value}|\times 100 \\

(here |x| is such that it makes x non negative, thus, |-5| = 5, and |5| = 5)

For the given case, it is specified that:

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Thus, percent error in Charlie's guess is calculated as:

\text{Percent Error} = |\dfrac{-1.8}{32.7}| \times 100 \approx 5.5\%

Hence, the percent error in Charlie’s guess is obtained approximately is given by: Option D: 5.5%

Learn more about percent error here:

brainly.com/question/25749180

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