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Naya [18.7K]
3 years ago
6

A bag contains 3 marbles, 3 rocks, and 3 pencil erasers. Hilde will take one item from the bag without looking. What is the prob

ability that she will NOT choose a rock?
A) 1/9
B) 1/3
C) 2/3
D) 8/9

(Me and a friend are arguing over this, She thinks it's B, I think it's C. Help?)
Mathematics
2 answers:
Misha Larkins [42]3 years ago
8 0
The answer is c trust me
CaHeK987 [17]3 years ago
6 0
The answer is C, I think.

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A cheese processing company wants to estimate the mean cholesterol content of all one-ounce servings of a type of cheese. The es
Mrrafil [7]

Answer:

The minimum sample size required to construct a 95% confidence interval for the population mean is 65.

Step-by-step explanation:

We are given the following in the question:

Population standard deviation,

\sigma = 3.10\text{ milligrams}

We need to construct a 95% confidence interval such that the estimate is within 0.75 milligrams of the population mean.

Thus, the margin of error must me 0.75

Formula for margin of error:

z_{critical}\times \dfrac{\sigma}{\sqrt{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

0.75 = 1.86\times \dfrac{3.10}{\sqrt{n}}\\\\\sqrt{n} = \dfrac{1.96\times 3.10}{0.75}\\\\\sqrt{n} = 8.101\\\Rightarrow n = 65.63\approx 65

Thus, the minimum sample size required to construct a 95% confidence interval for the population mean is 65.

5 0
3 years ago
Compare the fractions 5 by 9 and 6 by 11​
alukav5142 [94]

Answer:

5/9 and 6/11

= 5/9 × 11/11 and 6/11 × 9/9

= 55/99 and 54/99

= 55/99 > 54/99

<em>therefore, 5 by 9 is greater than 6 by 11</em>

4 0
3 years ago
Find the area of the polygon.
svetlana [45]
This is a trapezoid and the trapezoid formula is b1 plus b2/ 2 times height. 

17 plus 5 is 22. Divided by 2 is 11. 

Now, we have to multiply 11 by the height : 5. 

11 times 5 is 55 and that is your area. 55 units squared.
7 0
3 years ago
The expression 3(x-9) is equivalent to
Inessa05 [86]
The answer to this question would be D. 3(x)-3(9)
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3 years ago
Can someone please answer my unanswered question on my profile please I will give brainliest
Alborosie

I will help u if u need it

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3 years ago
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