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2 years ago

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Mathematics

1 answer:

IceJOKER [234]2 years ago

4 0

Answer:

12 or B is the answer

Step-by-step explanation:

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Write 2.14 in word form

Vesna [10]

Answer:

two dollars and fourteen cents

Step-by-step explanation:

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2 years ago

Read 2 more answers

Smith cut his peanut butter

Lorico [155]

The answer is the square root of 101.75
Assuming that the sandwich Is a square, after cutting it diagonally, it turns into 2 triangles. To look for a missing length of a triangle, you use Pythagorean’s theorem a^2+b^2=c^2
Since c is 12 and a is 6.5 you just square 12 and square 6.5
144 42.25
Subtract it
101.75
You then have to find the square root of it. You can leave it as it is as √101.75 or just solve for it and round it to 10.09

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2 years ago

What is BQD’s degree

AveGali [126]

Answer:i dont know

Step-by-step explanation:

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2 years ago

.11 A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to b

Troyanec [42]

Answer:

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

Step-by-step explanation:

Sample mean:

Sum of all values divided by the number of values. So

$M = \frac{1.01+0.97+1.03+1.04+0.99+0.98+0.99+1.01+1.03}{9} = 1$

Sample standard deviation:

Square root of the sum of the differences between each value and the mean, divided by the 1 less than the sample size. So

$s = \sqrt{\frac{(1.01-1)^2+(0.97-1)^2+(1.03-1)^2+(1.04-1)^2+(0.99-1)^2+(0.98-1)^2+(0.99-1)^2+(1.01-1)^2+(1.03-1)^2}{8}} = 0.0657$

Confidence interval:

We have the standard deviation for the sample, which means that the t-distribution is used 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 = 9 - 1 = 8

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 8 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 3.355

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 3.355\frac{0.0657}{\sqrt{9}} = 0.07$

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 1 - 0.07 = 0.93

The upper end of the interval is the sample mean added to M. So it is 1 + 0.07 = 1.07

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

7 0

2 years ago

The polygon circumscribes a circle. What is the perimeter of the polygon?

Nina [5.8K]

Answer:

68 cm

Step-by-step explanation:

Using the concept of tangents drawn from external point to a circle are congruent, we can find the Perimeter of polygon.

$Perimeter of polygon \\ = 2 \times 5 + 2 \times 6 + 2 \times 8 + 2 \times 15 \\ = 10 + 12 + 16 + 30 \\ = 68 \: cm \\$

6 0

3 years ago