All categories

4 years ago

Which of the following best describes an imaginary number?

2 answers:

5 0

The square root of a negative number. Because anything times itself can't give you a negative answer. Because a negative times a negative will equal a positive number.

zaharov [31]4 years ago

3 0

Answer: Option 'c' is correct.

Step-by-step explanation:

Imaginary numbers are those numbers which can be shown in the Argand plane in which x - axis represents the real numbers and y-axis represents the imaginary numbers and basically it is the square root of negative numbers.

For example : Square root of -1 = √-1 = i (say iota)

and i² = -1 and i⁴ = 1

Hence, option 'c' is correct.

You might be interested in

Brad bought a piece of industrial real estate for $192,345. The value of the real estate appreciated a constant rate per year. T

Zanzabum

Answer:

D. f(t) = 192,345(1.04)^t

Step-by-step explanation:

<em>I took the test and it was right. </em>

Also that is the original price and when you look at exponential functions, the starting point or original price is always first the then rate of increase. The table just shows how it increased in year 1 and 2.

Hope this helps. :)

4 0

3 years ago

leila saw that the dress was marked down 30 percent during a sale. if the original price was $130 what was the sale price of the

pychu [463]

Answer:

The sale price of the dress is $91

Step-by-step explanation:

leila saw that the dress was marked down 30% during a sale. If the original price was $130.

Which means,

130 × 30 ÷ 100 = $39

So,

$130 – $39 = $91

Thus, The sale price of the dress is $91

<u>-TheUnknownScientist 72</u>

6 0

3 years ago

Read 2 more answers

Two opposite vertices of a rectangle have coordinates (-3, -4) and (3, 4). The sides are parallel to the coordinate axes. What i

frutty [35]

I believe the answer is 48

8 0

3 years ago

An airplane is flying 600 mph on a horizontal path that will take it directly over an observer. The airplane remains a constant

dezoksy [38]

<h2>Change of the distance between the observer and the airplane when X = 5 miles is 348.84 mph</h2>

Step-by-step explanation:

We have by Pythagoras theorem

Distance between the observer and the airplane² = Horizontal distance² + Altitude²

d² = h² + a²

Here we have

h = X = 5 miles

a = 7 miles

d² = 5² + 7² = 74

d =8.60 miles

$\frac{dh}{dt}=600mph\\\\\frac{da}{dt}=0$

Differentiating d² = h² + a² with respect to time

$2d\frac{dd}{dt}=2h\frac{dh}{dt}+2a\frac{da}{dt}\\\\8.60\frac{dd}{dt}=5\times 600+7\times 0\\\\\frac{dd}{dt}=348.84mph$

Change of the distance between the observer and the airplane when X = 5 miles is 348.84 mph

5 0

4 years ago

X2+x+1 help I don’t know

german

That’s my answer X2+x+1

7 0

3 years ago