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eduard
3 years ago
14

If a turtle crawls 3 yards in one hour how far will the turtle crawl in an 1/4 of an hour

Mathematics
2 answers:
Elanso [62]3 years ago
6 0

Answer:0.75 meters

Step-by-step:

3/2=1.5/2=0.75

Sergio [31]3 years ago
5 0

Answer:

0.0833

Step-by-step explanation:

3 divided by 1/4

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So a man goes to sleep at 8 am and wakes up on the following day and wakes up at 1 am. can you tell me what happened?
Nata [24]

Answer:

He was on an airplane.

Step-by-step explanation:

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5 0
3 years ago
The average weight of 4 people is 166 pounds. If three of the people weigh 150 pounds, 200 pounds, and 180 pounds. What is the w
777dan777 [17]

Answer:

Step-by-step explanation:

To find the average of 4 things, we add those four things together and divide by 4.  So, here we need to do the opposite.  Since the last thing we would do to find the average is divide by four, we are going to start there and do the opposite.  The average is 166.  So...

166X4=664

Now instead of adding, we will subtract the three that we know, leaving the fourth.  664-200=464    464-150=314      314-180=134

So the weight of the fourth person is 134 pounds.

7 0
4 years ago
4. Mary has a pet ferret. She bought a bag of ferret food that contains 12 cups of food. The maker of the ferret food suggests f
bazaltina [42]

Answer:

12 days.

Step-by-step explanation:

She would have enough food to feed her pet ferret for 12 days, at a cup a day, before she would need to buy more.

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8 0
3 years ago
Salmon Weights: Assume that the weights of spawning Chinook salmon in the Columbia river are normally distributed. You randomly
Hitman42 [59]

Answer:

a) \bar X= 19.2 represent the sample mean. And that represent the best estimator for the population mean since \hat \mu =\bar X=19.2  b) The 90% confidence interval is given by (17.3;21.1)  

c) No, because 18 is above the lower limit of the confidence interval.

d) Because the parent population is assumed to be normally distributed.

The reason of this is because the t distribution is an special case of the normal distribution when the degrees of freedom increase.

Step-by-step explanation:

1) Notation and definitions  

n=17 represent the sample size

Part a  

\bar X= 19.2 represent the sample mean. And that represent the best estimator for the population mean since \hat \mu =\bar X=19.2  Part b

s=4.4 represent the sample standard deviation  

m represent the margin of error  

Confidence =90% or 0.90

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

2) Calculate the critical value tc  

In order to find the critical value is important to mention that we don't know about the population standard deviation, so on this case we need to use the t distribution. Since our interval is at 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. The degrees of freedom are given by:  

df=n-1=17-1=16  

We can find the critical values in excel using the following formulas:  

"=T.INV(0.05,16)" for t_{\alpha/2}=-1.75  

"=T.INV(1-0.05,16)" for t_{1-\alpha/2}=1.75  

The critical value tc=\pm 1.75  

3) Calculate the margin of error (m)  

The margin of error for the sample mean is given by this formula:  

m=t_c \frac{s}{\sqrt{n}}  

m=1.75 \frac{4.4}{\sqrt{17}}=1.868  

4) Calculate the confidence interval  

The interval for the mean is given by this formula:  

\bar X \pm t_{c} \frac{s}{\sqrt{n}}  

And calculating the limits we got:  

19.2 - 1.75 \frac{4.4}{\sqrt{17}}=17.332  

19.2 + 1.75 \frac{4.4}{\sqrt{17}}=21.068  

The 90% confidence interval is given by (17.332;21.068)  and rounded would be:  (17.3;21.1)

Part c

No, because 18 is above the lower limit of the confidence interval.

Part d

Because the parent population is assumed to be normally distributed.

The reason of this is because the t distribution is an special case of the normal distribution when the degrees of freedom increase.

8 0
4 years ago
What is the value of a? <br><br> –31<br> –7<br> –5<br> –1
gregori [183]

Answer:

i think its -31

Step-by-step explanation:

if im wrong im sorry

8 0
3 years ago
Read 2 more answers
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