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Brut [27]
2 years ago
15

20% of the students in the class play an instrument. if there are 35 students in class, how many play an instrument?

Mathematics
1 answer:
kondor19780726 [428]2 years ago
6 0

Answer:

7 students play an instrument.

Calculation:

35=100%

20%=[20×35]÷100

=7

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The image is an example of which type(s) of symmetry
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A. Both rotational and reflectional.

Step-by-step explanation:

We have been given an image of a regular polygon. We are asked to determine type(s) of symmetry for our given polygon.

Upon looking at our given polygon, we can see that it is a pentagon.

We know that a regular pentagon has five equal sides and five lines of symmetry.

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3 years ago
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Answer:

Picture #1: True

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3 0
3 years ago
A city has designed a survey to collect information about residents’ opinions about city services. Which of the following descri
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Bias refers to scenarios which might affect the ability of a statistical experiment to generalize, hence affecting the validity of research. Non-response bias occurs when majority of subjects <em>fail to respond during a survey</em>. Hence, a likely scenario is ; <em>surveys were mailed to 500 people, and 200 of the surveys were completed and </em><em>returned</em><em>.</em><em> </em>

  • Non - response bias has to do with a situation whereby a large percentage of the selected samples from a population do not respond or fail to participate in the experiment or survey.

  • If 200 surveys were returned, then 300 of the sample participants did not respond. Which means <em>60% of the sample are non-responsive</em>.

Therefore, a scenario where <em>surveys were mailed to 500 people, and 200 of the surveys were completed and </em><em>returned</em><em> </em>exemplifies a non - response bias.

Learn more :brainly.com/question/18405415

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