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finlep [7]
3 years ago
10

Help pleaseeeeeeeeeeee

Mathematics
1 answer:
BaLLatris [955]3 years ago
4 0

Answer:

C = 72.22

Step-by-step explanation:

d = 23

r = d/2 = 11.5

Circumference:

C = 2πr

C = 2(3.14)(11.5)

C = 6.28(11.5)

C = 72.22

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-1/3(6x-15)+6x>8x-11 solve.
arsen [322]

In this question, you're solving the inequality for x.

Solve:

-1/3(6x - 15) + 6x > 8x - 11

Distribute the -1/3 to the variables in the parenthesis.

-2x + 5 + 6x > 8x - 11

Combine like terms

4x + 5 > 8x - 11

Subtract 8x from both sides

-4x + 5 > - 11

Subtract 5 from both sides

-4x > -16

Divide both sides by -4, while also flipping the inequality, since you're dividing by a negative.

x < 4

Answer:

x < 4

7 0
3 years ago
Can someone help me plz!!
a_sh-v [17]

Answer:

C

Step-by-step explanation:

6 0
2 years ago
We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor.
Vladimir [108]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

The estimated proportion for this case is \hat p=0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

4 0
3 years ago
Help help help now plssss offering more than 5 points
zavuch27 [327]

Answer:

C

Step-by-step explanation:

4(10^2) = 400

Check:

10x10=100 (area of 1 wall)

100× 4(the 4 walls)

4(10^2) = 400✅

5 0
3 years ago
I need to find the slope, x intercept and y intercept please help
Sati [7]
Solve for y. the slope will be m, y intercept will be b
6 0
3 years ago
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