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4 years ago

This image shows a square pyramid.

Mathematics

2 answers:

AURORKA [14]4 years ago

5 0

Answer:

128

Step-by-step explanation:

I just took the test and I can confirm that this answer is correct! :D

Lynna [10]4 years ago

3 0

We know that

[Surface area ]=[the area of 4 triangles]+[the area of square base]
[the area of square base]=8*8--------> 64 ft²

[the area of 1 triangle]=(1/2)*b*h
b=8 ft
How the angle is 45°-------> h=b/2-------> h=4 ft
then
[the area of 1 triangle]=(1/2)*8*4------> 16 ft²
and
[the area of 4 triangles]=4*16--------> 64 ft²

[Surface area ]=[64 ft²]+[64 ft²]----------> 128 ft²

the answer is 128 ft²

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A Chi square test has been conducted to assess the relationship between marital status and church attendance. The obtained Chi s

Margarita [4]

Answer: a. reject the null hypothesis, church attendance and marital status are dependent

Step-by-step explanation:

If the obtained chi-square value is greater than the critical chi square value then we reject the null hypothesis.

Given : A Chi square test has been conducted to assess the relationship between marital status and church attendance. The obtained Chi square is 23.45 and the critical Chi square is 9.488.

Null hypothesis : There is no relationship between the variables.

Alternative hypothesis : There is a relationship between the variables.

Here we can see that the obtained chi-square (23.45) value is greater than the critical chi square value (9.488) , then we have to reject the null hypothesis.

So the correct answer is reject the null hypothesis, church attendance and marital status are dependent.

3 0

3 years ago

A news outlet posted a poll on its website asking what type of drink people preferred. Identify the problem with taking a survey

Jet001 [13]

Since the news outlet posted a poll on its website, it would be biased on the fact that it's on the website. Some people don't read the website, or don't have a computer or internet.

3 0

3 years ago

Read 2 more answers

77 prime or composite

Ludmilka [50]

Seventy-seven is a composite number.

Because you had to divide by eleven or seven. Then you can multiply by seven or eleven its equal to seventy-seven.

$77/11=7$

$11*7=77$

$77/7=11$

$7*11=77$

Final answer: $\boxed{=77}$

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

-Charlie

7 0

3 years ago

Solve for the equation, show all your work. This is an absolute value equation. You need to show both equations and the work for

VMariaS [17]

Answer:

$x=-1$ or $7$

Step-by-step explanation:

We use casework on when $3x-9=12$ and when $3x-9=-12$ .

For the first case, $3x-9=12$ , we add 9 to both sides to get

$3x=21$ .

Dividing both sides by 3 gives

$x=7.$

For the second case, $3x-9=-12$ , we add 9 to both sides to get

$3x=-3$ .

Dividing both sides by 3 gives

$x=-1$ .

Checking both cases, we plug in $x=7$ and $x=-1$ .

For the first case, we have $|3(7)-9|=|21-9|=|12|=12$ , which satisfies the equation.

For the second case, we have $|3(-1)-9|=|-3-9|=|-12|=12$ , which also satisfies the equation.

This gives us two solutions to the equation; $x=7$ and $x=-1$ .

4 0

2 years ago

Find the mean, median, and mode of the data set. Round to the nearest tenth.

statuscvo [17]

The mean is the average of the data set. Median is the value that separates the higher half and the lower half of the set of values. Mode is the value that occurs often in the data set. Therefore, the correct answer is option A, mean = 9.7, median = 10, mode = 15

6 0

4 years ago

Read 2 more answers