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marta [7]
3 years ago
10

How to do this in math

Mathematics
1 answer:
Mandarinka [93]3 years ago
6 0

Answer:

How to do what in math?

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a circular garden has a diameter of 12 feet. what is the best approximation for the circumference of the garden? use 3.14 to app
Nuetrik [128]

Answer:

37.68

Step-by-step explanation:

C(circumference)= 2pi r

If the diameter is 12, the r adius is 6

plug into equation

2(pi)(6)

=12pi

=37.68

3 0
3 years ago
Can I have help with this!!!!!!!!!!
77julia77 [94]

Answer:

The answer is 19

Step-by-step explanation: 13 scored from 91-100, and 6 scored from 81-90, all you have to do is add them together.

3 0
2 years ago
Read 2 more answers
What is 25/7 in simplest form
Triss [41]
7 is a prime number, which means it can't be simplified. This fraction is already in simplest form, also because 25 and 7 don't have any common factors.
7 0
3 years ago
Read 2 more answers
Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a
Natasha_Volkova [10]

Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 25 - 1 = 24

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 2.064

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.064\frac{10.2}{\sqrt{25}} = 4.21

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 81.5 - 4.21 = 77.29

The upper end of the interval is the sample mean added to M. So it is 81.5 + 4.21 = 85.71.

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

6 0
3 years ago
What is the 5-digit code?
kvv77 [185]

9514 1404 393

Answer:

  4 2 6 1 7 or 1 2 4 3 7

Step-by-step explanation:

4 are correct of 1,3,4,6,7

3 are correct of 0,2,3,6,7

1 is correct of 0,3,6,8,7 -- so not both 3 and 6, meaning 1, 4, 7 are correct

Correct digits so far are 1, 4, 7 and one of {3, 6}. Line 2 tells another is 0 or 2; line 3 tells it is not 0. This adds 2 to the list of correct digits.

This makes the correct digits 1, 2, {3, 6}, 4, 7. We don't know whether the last digit is 3 or 6.

__

Looking at digits correctly placed, line 2 tells us the code is either ...

  _ 2 6 _ 7  or  _ 2 _ 3 7

Then line 1 fills in those blanks as ...

  4 2 6 1 7  or  1 2 4 3 7

Either of these codes agrees with all of the clues.

3 0
2 years ago
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