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Sliva [168]
3 years ago
11

The principal of a school claims that 30 % of grade 3 pupils stay in the playground after their classes. A survey among 500 grad

e 3 pupils revealed that 150 of them stay in the playground after their classes. Use 99% confidence to conduct a test of proportions.
No unrelated answers or links or you will be reported. Thanks​
Mathematics
1 answer:
ycow [4]3 years ago
5 0

Answer:

A survey among 500 grade 3 pupils revealed that 150 of them stayin the playground after their classes. Use 95% confidence to conduct a test of proportion. 1 1.

Step-by-step explanation:

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Simplify (7/2a)*(5/a^2)
anyanavicka [17]

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Go look on M a t h w a y

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M A t h w a y

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2 years ago
Which graphs are proportional?
Komok [63]

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Its C because it passes through the origin. I learned about this.

6 0
3 years ago
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Y< 4 3 ​ x+3 y≤−2x−1 ​ Which graph represents the system of inequalities?
lukranit [14]

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Don't see any graphs

Step-by-step explanation:

5 0
3 years ago
A person is riding a Ferris wheel has a radius of 50ft. find the linear speed of the person in feet per minute if the Ferris whe
kifflom [539]

The linear speed of a person on this Ferris wheel is about 628.2 ft/min.

<h3>What is Linear Speed ?</h3>

As a body travels a circular path, it has both a linear speed and an angular speed. The rate it travels on that path is the linear speed, and the rate it turns around the center of that path is the angular speed. The linear speed (v) and angular speed (ω) are related by the radius (r) or v = rω .

Given that ;

Radius = r = 50 ft

Frequency = f = 2 rev/min

The angular speed is the product of the angular displacement for one complete turn, namely 2π radians per revolution, and the frequency (f). That is, the angular speed is equal to ω = 2πf. Substituting this into the formula for linear speed (v), we get:

                                v = r (2πf)

                                    = (50 ft) ( 2π / rev) ( 2 rev/min)

                                    = 200π ft/min

                                    ≈ 628.2 ft/min

The linear speed of a person on this Ferris wheel is about 628.2 ft/min.

Learn more about linear speed here ;

brainly.com/question/14413779

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4 0
1 year ago
How do you determine a scale factor for two similar figures? <br> 15 points
mr_godi [17]

the scale factor or ratio of two similar figures, will be the same as the ratio of their perimeter, or even the ratio of two corresponding sides.


for example, we have say, an irregular octagon with a perimeter of say 13, and a similar octagon with a perimeter of 39, then


\bf \cfrac{\textit{small octagon}}{\textit{large octagon}}~\hspace{5em}\cfrac{perimeter}{perimeter}\implies \cfrac{13}{39}\implies \stackrel{simplified}{\cfrac{1}{3}}~\hfill \stackrel{\textit{scale factor}}{1:3}


which is another way to say, the smaller is 1/3 of the larger one, or the larger one is 3 times as the smaller one.

4 0
3 years ago
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