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Sunny_sXe [5.5K]
4 years ago
10

Write and solve an equation to answer the question. What number is 28% of 75?

Mathematics
1 answer:
tankabanditka [31]4 years ago
7 0

Answer:

21

Step-by-step explanation:

28% of 75 is represented by

28/100* 75

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The owner of a restaurant is reviewing customer complaints. In a random sample of 227 complaints, 57 complaints were about the s
iragen [17]

Answer:

0.1375 to 0.3624

Step-by-step explanation:

Given :The owner of a restaurant is reviewing customer complaints. In a random sample of 227 complaints, 57 complaints were about the slow speed of the service.

To Find :Create a 95% confidence interval for the proportion of complaints that were about the slow speed of the service.

Solution:

n = 227

x = 57

Formula of confidence for proportion: \widecap{p}-z_{\frac{\alpha}{2}}\sqrt{\frac{\widecap{p}\widecap{q}}{n}} to  \widecap{p}+z_{\frac{\alpha}{2}}\sqrt{\frac{\widecap{p}\widecap{q}}{n}}

\widecap{p}=\frac{x}{n}

\widecap{p}=\frac{57}{227}

\widecap{p}=0.25

\widecap{q}=1-\widecap{p}

\widecap{q}=1-0.25

\widecap{q}=0.75

z at 95% is 1.96

Substitute the values in the formula :

Confidence for proportion: 0.25-1.96\sqrt{\frac{0.25 \times 0.75}{57}} to 0.25+1.96\sqrt{\frac{0.25 \times 0.75}{57}}

Confidence for proportion: 0.1375 to 0.3624

Hence 95% confidence interval for the proportion of complaints that were about the slow speed of the service is  0.1375 to 0.3624

6 0
3 years ago
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Write an equation for a function that has a range of y is greater than or equal to -3
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\sqrt{x + 3}


Since Square Roots must be greater than or equal to three, just add three to the square root to make it be greater than or equal to negative 3

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4 years ago
Express in litres. 80000mm​
ira [324]

Answer:

8 l

Step-by-step explanation:

1 l = 1000 mm

8000 mm = 8000/1000

8000 mm = 8 l

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216q^3+15q^3 please help me solve it​
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Answer:

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Step-by-step explanation:

Just add them together. They have the same expressions. Whenever you see a number with an ending similarly to another such as 3x and 2x, they can add together.

This is no different. If something is 6x^2 and another is 7x^2, you would add them to get 13x^2.

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What is the volume of this square based pyramid?
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Hey There! I can help you by explaining how to solve it but not answering sorry! Anyhow, To find the volume of a square based pyramid I suggest you start with the square and do L x W. Than Solve the triangles by using formula 0.5 * b * h. Hint: On the bottom triangle use 8cm from the square with the 3.8cm. Hope you now understand and can find the answer!

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