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diamong [38]
3 years ago
8

Billy is playing in his sandbox. He enjoys burying his toys in the sand. He has 3

Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0

Answer:

2:7

Step-by-step explanation:

the probability of Billy getting a tractor is 2:7 because you have to add up all the toys in total and whatever you want to find the ratio of that is your answer.

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2 years ago
In a random sample of fivefive microwave​ ovens, the mean repair cost was ​$75.0075.00 and the standard deviation was ​$13.0013.
Radda [10]
<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

\mu=\$75.00

\sigma=\$13.00

Significance level for 90% confidence = \alpha=1-0.90=0.1

Using t-value table , t-critical value for 90% confidence:

t_{\alpha/2, df}=t_{0.05, 4}=2.132.

Margin of error of \mu: E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39

Interpretation : The repair cost will be within $12.39 of the real population mean value \mu 90% of the time.

7 0
3 years ago
Solve for n.<br> n-26 = -13<br> n=1
Paraphin [41]

Answer:

I believe n equals 13.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Brianna answered 80% of the questions correct on her math test. Which fraction represents the number of questions she answered c
LiRa [457]

Answer: 4/5

Step-by-step explanation:

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7 0
3 years ago
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Please help! Will give brainliest :)
Vedmedyk [2.9K]

Answer:

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Step-by-step explanation:

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Have an awesome day! :D

7 0
2 years ago
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