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andreyandreev [35.5K]
3 years ago
7

I'm literally begging someone to do this i'm so confuse

Mathematics
2 answers:
LiRa [457]3 years ago
8 0

Answer:

i think its D! pls let me know if im wrong.

Step-by-step explanation:

tatuchka [14]3 years ago
5 0

Answer:

D

Step-by-step explanation:

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Assume the readings on thermometers are normally distributed with a mean of 0degreesC and a standard deviation of 1.00degreesC.
Nat2105 [25]

Answer:

P(-2.05

And we can find this probability with this difference

P(-2.05

And we can see the figure in the plot attached.

Step-by-step explanation:

Let X the random variable that represent the redings on thermometers of a population, and for this case we know the distribution for X is given by:

X \sim N(0,1)  

Where \mu=0 and \sigma=1

We are interested on this probability

P(-2.05

We can use the z score formula given by:

z=\frac{x-\mu}{\sigma}

Using this formula we got:

P(-2.05

And we can find this probability with this difference

P(-2.05

And we can see the figure in the plot attached.

5 0
4 years ago
In a survey of 420 people, 85% said they drink coffee
PSYCHO15rus [73]
420 x 0.85 = 357

357 out of the 420 said they drink coffee. 
6 0
3 years ago
In the equation y= -2x -3 over 5, identify the slope, the y-intercept, and whether the line is rising, falling, horizontal, or v
Hoochie [10]

Answer:

Slope = -2

y-intercept = -3/5

Falling

Step-by-step explanation:

y= -2x - \frac{3}{5}  \\ y = mx + b

m = Slope = -2

y-intercept = b =

-  \frac{3}{5}

The slope of the equation has a negative number so the graph is falling

8 0
4 years ago
I am a 2-digit number. If you divide me by 5 then multiply by 2, the I? product is 20. What number am
Kay [80]
So we are going to make this into a equation and evaluate it: 
20 = (n ÷ 5) x 2 
This is a two-step equation. 
First we divide both sides by 2. We now have:10 = n ÷ 5 
Then we multiply each side by 5. Now we have the final answer:50 = n
The two-digit number is 50, hope this helps!
4 0
3 years ago
Find the total surface area of each of the following cylinders.
zhuklara [117]

Answer:

272\pi

Step-by-step explanation:

Area of Circle =

\pi   {r}^{2}  \\ r \:  =  \frac{8}{2} = 4 \\ \pi {4}^{2}   = 16\pi

Circumference =

\pi d \\ 8\pi

SA =

2(16\pi) + 30(8\pi) = 272\pi

5 0
3 years ago
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