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madam [21]
3 years ago
9

Find the radius of a circle whose circumference is 9pie

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
6 0

Answer:

1.4 (rounded to the nearest tenth)

1.43 (rounded to the nearest hundredths)

1.432 (rounded to the nearest thousandths)

Step-by-step explanation:

C=2 π r

C/2 π = 9/2 * π = (depends what is is rounded to really)

Nookie1986 [14]3 years ago
6 0
Download Socratic it will help you!
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Please help and show work!!
Law Incorporation [45]

-67\geq5+3n-21\\\\-67\geq3n+(5-21)\\\\-67\geq3n-16\ \ \ \ |+16\\\\-51\geq3n\ \ \ \ |:3\\\\-17\geq n\to n\leq-17\\\\Answer:\ \boxed{B.\ n\leq-17}

8 0
3 years ago
The meal tax at a restaurant is 5%. What is the tax on a dinner that costs $24?
Rudik [331]

The tax is the money on top of the original cost of the dinner. So, we need to find 5% of 24, as that is what the tax is at the restaurant - 5% of the price.

24 x 0.05 = 1.20

The tax on a dinner that costs $24 is $1.20.

Hope this helps!! :)

6 0
3 years ago
A newspaper published an article about a study in which researchers subjected laboratory gloves to stress. Among 215 vinyl​ glov
pickupchik [31]

Answer:

z=\frac{0.7-0.07}{\sqrt{0.385(1-0.385)(\frac{1}{215}+\frac{1}{215})}}=13.42  

p_v =P(Z>13.42)\approx 0  

So the p value is a very low value and using any significance level given \alpha=0.01 we se that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that vinyl gloves have a greater virus leak rate than latex gloves at 1% of significance.

Step-by-step explanation:

Data given and notation  

n_{V}=215 sample of vinyl gloves selected

n_{L}=215 sample of latex gloves selected

p_{V}=0.7 represent the proportion of vynil gloves with leaked viruses

p_{L}=0.07 represent the proportion of latex gloves with leaked viruses

z would represent the statistic (variable of interest)  

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

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the vinyl gloves have a greater virus leak rate than latex gloves , the system of hypothesis would be:  

Null hypothesis:p_{V} \leq p_{L}  

Alternative hypothesis:p_{V} > \mu_{L}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{V}-p_{L}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{V}}+\frac{1}{n_{L}})}}   (1)

Where \hat p=\frac{X_{V}+X_{L}}{n_{V}+n_{L}}=\frac{0.7+0.07}{2}=0.385

Calculate the statistic

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.7-0.07}{\sqrt{0.385(1-0.385)(\frac{1}{215}+\frac{1}{215})}}=13.42  

Statistical decision

Since is a one right tailed test the p value would be:  

p_v =P(Z>13.42)\approx 0  

So the p value is a very low value and using any significance level given \alpha=0.01 we se that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that vinyl gloves have a greater virus leak rate than latex gloves at 1% of significance.

3 0
3 years ago
Read 2 more answers
How would I solve this?? 5p-8(p+1)>16
alexandr402 [8]

<em>*To solve inequalities is similar to solving equations: isolate the desired variable to one side.</em>

So firstly, distribute -8 to (p + 1):

5p-8p-8>16

Next, combine like terms:

-3p-8>16

Next, add 8 to both sides:

-3p>24

Lastly, divide both sides by -3. Now since you are dividing by a <u>negative</u>, you will be flipping the inequality symbol as well.<u> Your final answer will be p</u>

6 0
3 years ago
800dollars increased by 25%
AleksAgata [21]
$800 increased by 25% = 1.25 x 800 = $1,000
7 0
3 years ago
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