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miv72 [106K]
3 years ago
12

Help appreciated !!!!

Mathematics
1 answer:
sergiy2304 [10]3 years ago
3 0

Answer:

Step-by-step explanation:

The circle is divided into 5 sections. The probability that the needle lands on a particular color is equally likely.

   So,

        P(red) = \frac{1}{5}\\\\P(green) = \frac{1}{5}\\\\

   Probability of not blue = 1 - Probability of blue

                                      = 1 - P(blue)\\\\=1 - \frac{1}{5}\\\\= \frac{4}{5}

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What is the volume of the cylinder below? Use 3.14 for x and round to the nearest tenth.
sdas [7]
The last one 1,459.3
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3 years ago
If you want to convert 232323 to a fraction will you multiply by 10or 100​
Andre45 [30]

Answer:

it would actually be the opposite because if u multiply ur making the number higher, it can be a fraction but it would be 23/1 and thats a whole number u would need to divide by 100 and 100 bc if 10 u get 2 3/10 and if u divide by 100 u get 23/100 either way u get a fraction but if u divide by 10 u get a mixed fraction. If u just want a fraction u would have to divide from 100

Step-by-step explanation:

the same is for dividing decimals

8 0
3 years ago
Solve for xxx.<br> x=x=x, equals
Sever21 [200]

Answer: The answer is of course, 3.

Step-by-step explanation:

7 0
2 years ago
An automobile manufacturer claims that its van has a 31.3 miles/gallon (MPG) rating. An independent testing firm has been contra
Yuliya22 [10]

Answer:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82  

p_v =2*P(z  

If we compare the p value and the significance level given \alpha=0.02 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the true mean is NOT significantly different from 31.3 at 2% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=31.1 represent the sample mean

\sigma=1.3 represent the population standard deviation for the sample  

n=140 sample size  

\mu_o =31.3 represent the value that we want to test  

\alpha=0.02 represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We can assume that we conduct a hypothesis in order to check if the true mean is equal to 31.3 , the system of hypothesis would be:  

Null hypothesis:\mu =31.3  

Alternative hypothesis:\mu \neq 31.3  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82  

P-value  

Since is a two-sided test the p value would be:  

p_v =2*P(z  

Conclusion  

If we compare the p value and the significance level given \alpha=0.02 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the true mean is NOT significantly different from 31.3 at 2% of signficance.  

5 0
2 years ago
Bill got 60% off a new jacket. He ended up spending $18. What was the original price of jacket?
Virty [35]

Answer:

45

Step-by-step explanation:

first create a proportion.

40/100 = 18/x

you're trying to find x, the original price, so to find x you'll need to cross multiply. 18 times 100 divided by 40, which is 45.

The original price was $45

5 0
3 years ago
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