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3 years ago

At Michael's Craft Store, the paiat set that you

Mathematics

1 answer:

andrew11 [14]3 years ago

8 0

Answer:

Step-by-step explanation:

10 percent off of 26 would be 23.4, then 40 percent off of 23.4 would be 9.36

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A rectangular photo frame covers an area of 20 square inches on a wall. The width of the frame is 1 inch less than its length. F

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You need to find two factors of 20 that are consecutive: 4,5.
Answer: 5inx4in

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3 years ago

Does a rhombus have parallel lines

oksano4ka [1.4K]

Yes it has 2 sets of parallel lines.

5 0

2 years ago

Read 2 more answers

The amount of lateral expansion (mils) was determined for a sample of n = 8 pulsed-power gas metal arc welds used in LNG ship co

Alona [7]

Answer:

95% Confidence interval for the variance:

$3.6511\leq \sigma^2\leq 34.5972$

95% Confidence interval for the standard deviation:

$1.9108\leq \sigma \leq 5.8819$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the standard deviation σ and the variance σ².

The sample, of size n=8, has a standard deviation of s=2.89 miles.

Then, the variance of the sample is

$s^2=2.89^2=8.3521$

The confidence interval for the variance is:

$\dfrac{ (n - 1) s^2}{ \chi_{\alpha/2}^2} \leq \sigma^2 \leq \dfrac{ (n - 1) s^2}{\chi_{1-\alpha/2}^2}$

The critical values for the Chi-square distribution for a 95% confidence (α=0.05) interval are:

$\chi_{0.025}=1.6899\\\\\chi_{0.975}=16.0128$

Then, the confidence interval can be calculated as:

$\dfrac{ (8 - 1) 8.3521}{ 16.0128} \leq \sigma^2 \leq \dfrac{ (8 - 1) 8.3521}{1.6899}\\\\\\3.6511\leq \sigma^2\leq 34.5972$

If we calculate the square root for each bound we will have the confidence interval for the standard deviation:

$\sqrt{3.6511}\leq \sigma\leq \sqrt{34.5972}\\\\\\1.9108\leq \sigma \leq 5.8819$

6 0

3 years ago

If f(5)=a what is the value of a

Dvinal [7]

Answer:

a = 5

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Find the area of the blue shape below. Use 3.14 for π

Anika [276]

Answer:

1413.86 ft^2.

Step-by-step explanation:

The diameter of the circle = 50 - 2(18)

= 50-36

= 14 ft.

So its radius is 7 ft.

The total area of the blue shape

= 2(35 * 18) + 3.14*7^2

= 1413.86 ft^2.

7 0

1 year ago