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vovikov84 [41]
2 years ago
7

(30 points) Find the volume of the cylinder.

Mathematics
1 answer:
Gelneren [198K]2 years ago
4 0

Answer:

I guess both of the answers are correct.Hope the picture will help you.....

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X-y=-10<br> 2x+4y=22 Solving Systems by Substitution
IRINA_888 [86]

Answer:

 [1]    x - y = -10

  [2]    2x + 4y = 22

Step-by-step explanation:

// Solve equation [1] for the variable  x  

 

 [1]    x = y - 10

// Plug this in for variable  x  in equation [2]

  [2]    2•(y -10) + 4y = 22

  [2]    6y = 42

// Solve equation [2] for the variable  y  

  [2]    6y = 42  

  [2]    y = 7  

// By now we know this much :

   x = y-10

   y = 7

// Use the  y  value to solve for  x  

   x = (7)-10 = -3

I am sorry if I got it wrong but I hope this helped.

MARK ME BRAINLEST.

8 0
3 years ago
In a bag there are 4 black marbles and 2 green marbles. What is the probability of choosing a black marble, not replacing it, th
uranmaximum [27]

Answer:

It'd be 4/15

Step-by-step explanation:

The total marbles is 6, so for black it's 4/6, but it's not being put back in so for the next one, the denominator would be 5. For green it's 2/5

4/6 times 2/5 equal 4/15

Hope this helps!

8 0
2 years ago
The Student Monitor surveys 1200 undergraduates from 100 colleges semiannually to understand trends among college students. Rece
nlexa [21]

Answer:

A sample size of 385 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

You feel that a reasonable estimate of the standard deviation is 10.0 hours.

This means that \sigma = 10

What sample size is needed so that the expected margin of error of your estimate is not larger than one hour for 95% confidence?

A sample size of n is needed. n is found when M = 1. So

M = z\frac{\sigma}{\sqrt{n}}

1 = 1.96\frac{10}{\sqrt{n}}

\sqrt{n} = 1.96*10

(\sqrt{n})^2 = (1.96*10)^2

n = 384.16

Rounding up:

A sample size of 385 is needed.

7 0
3 years ago
Can someone please help me?
I am Lyosha [343]
I used to look at the examples i can’t remember now what it is but look at the examples
7 0
3 years ago
Please I’ll give u brainlesst there is an image attached
-Dominant- [34]

Answer:

I could only find a single semi-complete question on that paper due to the quality of the picture.  <u>The carbon dioxide and water escape from the tube, because as gases, they do not have a definite shape or volume, and instead expand to fit whatever container they are in.</u>

Hope it helps

5 0
3 years ago
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