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bazaltina [42]
3 years ago
7

A circle has a circumference of 7850 units. What is the radius?

Mathematics
1 answer:
wel3 years ago
6 0

Answer:

About 1249.366

Step-by-step explanation:

After plugging the circumference into the formula c=2π*r and solving, we get about 1249.366. You can round it however necessary :)

Hope I helped!

p.s: there's calculators online that can help you convert between circumference, diameter, area, and radius! Here's a link to one that I use!

https://www.omnicalculator.com/math/circumference

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Leni [432]

Answer:

a) Null hypothesis:\mu \leq 120  

Alternative hypothesis:\mu > 120  

b) t=\frac{130-120}{\frac{40}{\sqrt{80}}}=2.236  

The degrees of freedom are given by:

df = n-1 = 80-1=79

The p value for this case taking in count the alternative hypothesis would be:

p_v =P(t_{79}>2.236)=0.0141  

Step-by-step explanation:

Information given

\bar X=130 represent the sample mean for the amount spent each shopper

s=40 represent the sample standard deviation

n=80 sample size  

\mu_o =120 represent the value to verify

t would represent the statistic    

p_v represent the p value f

Part a

We want to verify if the shoppers participating in the loyalty program spent more on average than typical shoppers, the system of hypothesis would be:  

Null hypothesis:\mu \leq 120  

Alternative hypothesis:\mu > 120  

The statistic for this case would be given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

Replacing the info given we got:

t=\frac{130-120}{\frac{40}{\sqrt{80}}}=2.236  

The degrees of freedom are given by:

df = n-1 = 80-1=79

The p value for this case taking in count the alternative hypothesis would be:

p_v =P(t_{79}>2.236)=0.0141  

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Les gusta mi dibujo soy nueva
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Answer:

Si, es muy bueno!

Step-by-step explanation:

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Check the picture below.

let's recall that the point of tangency  with the radius chord is always a right-angle.

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