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4 years ago

In geometry, a solid may exist in a plane. O A. True OB. False

Mathematics

2 answers:

Murrr4er [49]4 years ago

7 0

Answer:

False

Step-by-step explanation:

The objects in a plane must be flat, like a triangle or a line, so a solid can't exist.

il63 [147K]4 years ago

5 0

Answer: False

Step-by-step explanation: I did this already

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The variance of a distribution is 195. What is the standard deviation, rounded to the nearest thousandth?

stiks02 [169]

Given:

The variance of a distribution = 195.

To find:

The standard deviation, rounded to the nearest thousandth.

Solution:

Standard deviation of a distribution is the square root of the variance of the distribution.

Here, the standard deviation of the distribution is

$S.D.=\sqrt{195}$

$S.D.=13.96424$

$S.D.\approx 13.964$

Therefore, the standard deviation is 13.964.

8 0

4 years ago

2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.

Andrei [34K]

Let $x$ and $x+1$ be these consecutive integers. For some base $b$ , we can write

$(x_{10})^2=220_b=2b^2+2b$

$((x+1)_{10})^2=251_b=2b^2+5b+1$

$x^2=2b^2+2b$

then

$x^2+1=2b^2+2b+1$

Now,

$x^2+2x+1=2b^2+5b+1$

$2x+2b^2+2b+1=2b^2+5b+1$

$\implies2x=3b$

Squaring both sides gives

$4x^2=9b^2$

and so

$4(2b^2+2b)=9b^2$

$\implies8b^2+8b=9b^2$

$\implies b^2-8b=0\implies\boxed{b=8}$

(because the base has to be non-zero)

3 0

3 years ago

What is the ships speed

jarptica [38.1K]

Answer:

You need a photo or text to back that up, we can't solve this without an image or something that explains this problem.

Step-by-step explanation:

7 0

3 years ago

Plz help me with 49 & 50 plz<br><br>who can help in 2 mins will br marked as brainlientiest

S_A_V [24]

49. 100-36= how many girls in percent
= 64%
64%= 16 girls
64/100=16/x
cross multiply
1600=64x
x=25

7 0

3 years ago

Can you guys help me please!!

ella [17]

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$\huge\bold\red{{Answer:}}$

1.C

2.C

3.D

4.D

5.D

6.A

7.C

8.B

9.A

10.C

11.A

12.B

13.D

14.C

7 0

3 years ago