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mariarad [96]
3 years ago
8

What factor must you multiply a number in order to double its square root?

Mathematics
1 answer:
ryzh [129]3 years ago
6 0

Let x = the number

Let c = the factor

You want

√(cx) = 2√x

Solve for c:

cx = 4x

c = 4

You need to multiply by 4 to double the square root. Have a great day!!

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Please help! :)
Volgvan

Answer:

So the correct option is First one

i.e \dfrac{9\pi}{A}=\dfrac{90}{360}

Step-by-step explanation:

Given:

Area of Shaded part = 9 π square feet

To Find :

Area of Circle = ?

Solution:

90 degree center angle is equivalent to an area of 9 Π  square feet

So, 360 degree center is equivalent to area A which is the area of the complete circle.

So the Ratio will be

\dfrac{90}{9\pi} =\dfrac{360}{A}

Setting the given statements in proportion:

\dfrac{90}{9\pi} =\dfrac{360}{A}

On solving we get the required

\dfrac{9\pi}{A} =\dfrac{90}{360}

So the correct option is First one

i.e \dfrac{9\pi}{A}=\dfrac{90}{360}

Alternate Method:

Shaded part is of 90°

Area of Shaded part = 9 π square feet

And Full Circle is of 360° that is 4 sector of 90°

\textrm{Area of Circle}=4\times (Shaded\ part)

\textrm{Area of Circle}=4\times 9\pi

\textrm{Area of Circle}=36\pi

So the correct option is First one

i.e \dfrac{9\pi}{A}=\dfrac{90}{360}

On solving this we get

A=36\pi\ feet^{2}

8 0
3 years ago
Please answer the 1 question in the picture, thanks
Anestetic [448]

Answer:

40

Step-by-step explanation:

LxW=A

So 4x10=40

Hope this helps

7 0
2 years ago
Read 2 more answers
Which of the following has a constant of proportionality of 2? A) y = 2x B) y = x + 2 C) 2y = x D) y + 2 = 2x
Setler [38]

The correct answer is A.


You have direct variation if x and y are modeled by the equation


y = mx


In this case, m is the constant of proportionality. So, if the constant has to be 2, the equation becomes


y = 2x


A side note: Actually, option C has a constant of proportionality of two as well, except the roles of x and y are interchanged. I chose option A because usually you want the y = mx form, but the names of the variables are obviously meaningless.

5 0
3 years ago
Read 2 more answers
if $38 is invested at a simple interest rate of 2% per year, what would the total account balance be after forty years?
Debora [2.8K]

The answer is$30.40

I=P×R×T

I=38×.02×40

I=30.40

6 0
3 years ago
20-90x-50x^2 <br> find the vertex
lawyer [7]
I think it’s your answer

4 0
3 years ago
Read 2 more answers
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