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Soloha48 [4]
3 years ago
12

What is the area of the shape?

Mathematics
2 answers:
gladu [14]3 years ago
6 0

Answer:Area is the size of a surface

Step-by-step explanation:

MrMuchimi3 years ago
4 0

Answer:

The size of the surface of a 2D shape

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How many ft2 are in a rectangle 12.6 yd long and 8.6 yd wide? (A = lw)​
Usimov [2.4K]

Answer:

108.36 ft2

Step-by-step explanation:

Use the facts we already know and plug them into the equation.

a=12.6(8.6)

If we multiply both factors, we get 108.36.

So, the rectangle is 108.36 ft2

3 0
3 years ago
A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sa
Semenov [28]

Answer:

H₀: μ₁ - μ₂ = 0

H₁: μ₁ - μ₂ ≠ 0

(–2975, 175)

Do not reject H₀

Step-by-step explanation:

Hello!

The objective of this experiment is to test if the salaries of elementary school teachers are equal in two districts. You can test this trough the population means of the salaries of the teachers if they are either equal or different or directly test if the difference between the salaries of the two districts is cero or not, symbolically: μ₁ - μ₂ = 0

Remember, in the null hypothesis is usually stated the known information, is the "no change" premise and always carries the = symbol.

The hypothesis is:

H₀: μ₁ - μ₂ = 0

H₁: μ₁ - μ₂ ≠ 0

You have two normally distributed variables and you are studying the difference of the means. You can use a pooled Z to make the interval, the formula is:

X[bar]₁-X[bar]₂ ± Z_{1-\alpha /2}*(√(σ₁²/n₁+σ₂²/n₂)

Since the test is two-tailed and at a signification level of 5% I've made the interval at the complementary confidence level of 95% so that I can use it to decide over the hypothesis.

X[bar]₁-X[bar]₂ ± Z_{1-\alpha /2}*(√(σ₁²/n₁+σ₂²/n₂)

Z_{1-\alpha /2} = Z_{0,975} = 1,96

[28900-30300 ± 1.96*(√((2300)²/15+(2100)²/15)]

[-1400 ± 1576,15]

[-2976.15;176,15]

Since I've approximated to two decimal units in the intermediate calculations, the values ​​differ slightly, but the interval is:

(–2975, 175)Now, since the 0 is contained in the Confidence interval, the decision is to not reject the null hypothesis. In other words, the difference in average salaries between the two districts is cero.

I hope it helps!

4 0
3 years ago
What is 2+2 thank yiu to everyone btwa
EleoNora [17]

Answer:

2+2=4

Step-by-step explanation:

2 plus 2 is 4

an example for you to understand

if you have 2 cookies and i give you 2 more then you now have 4 cookies to enjoy!

4 0
3 years ago
Which of the following proportions can be used to find the value of n?​
MakcuM [25]

Answer:

B. \frac{n}{11} =\frac{15}{5}

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Here are the correct answers for these questions below<br> A = 028<br> B = 210
Fynjy0 [20]

Umm...... Okay then..?

7 0
3 years ago
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