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grigory [225]
3 years ago
8

Is there some people who dont wear there retainer and still have straight teeth? cause mine still is

Mathematics
1 answer:
RideAnS [48]3 years ago
5 0

Answer:

I Think Yes!

Step-by-step explanation:

Cause I Also Have A Straight Teeth and Also I Don't Wear Retainer!!

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A random sample of 100 automobile owners in thestate of Virginia shows that an automobile is driven onaverage 23,500 kilometers
Anastaziya [24]

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a) 22497.7 < μ< 24502.3

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Step-by-step explanation:

Given that:

Mean (μ) = 23500 kilometers per year

Standard deviation (σ) = 3900 kilometers

Confidence level (c) = 99% = 0.99

number of samples (n) = 100

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\frac{\alpha }{2} =\frac{0.01}{2}=0.005\\ z_{\frac{\alpha }{2}}=z_{0.005}=2.57

Using normal distribution table, z_{0.005 is the z value of 1 - 0.005 = 0.995 of the area to the right which is 2.57.

The margin of error (e) is given as:

e= z_{0.005}\frac{\sigma}{\sqrt{n} }  = 2.57*\frac{3900}{\sqrt{100} } =1002.3

The 99% confidence interval = (μ - e, μ + e) = (23500 - 1002.3, 23500 + 1002.3) =  (22497.7, 24502.3)

Confidence interval = 22497.7 < μ< 24502.3

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5 0
3 years ago
What is the measure of an interior angle in a regular dodecagon?
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-------------------------------
Answer : 150°
------------------------------
8 0
3 years ago
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Rate  of  change=<span><span>change  in  y divided by </span><span>change  in  <span>x
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x= 1,2,3
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Change in y = 3
Change in x = 1
3 / 1 = 3
So, the rate of change is 3.</span></span></span>
3 0
3 years ago
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