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PSYCHO15rus [73]
2 years ago
13

A rectangular store measured 6.5m by 7.9m. a square tile of side 20cm is used to cover the floor. approximately how many tiles w

ere used ?
Mathematics
1 answer:
Lapatulllka [165]2 years ago
6 0

The number of squares tiles that will be required to floor the rectangular store is approximately 1284 tiles

<h3>How to find the number of tiles used for the rectangular floor?</h3>

The rectangular store measures 6.5m by 7.9m.

Therefore,

area of a rectangle = lw

where

  • l = length
  • w = width

Therefore,

area of a rectangle = 6.5 × 7.9

area of a rectangle = 51.35 m²

The square tiles used for the floor is 20cm each. Therefore,

20 cm = 0.2m

hence

area of the square tile = 0.2² = 0.04 m²

number of tiles = 51.35 / 0.04 = 1283.5

number of tiles ≈ 1284 tiles

learn more on rectangle here:brainly.com/question/1040195

#SPJ1

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A researcher claims that the variation in the salaries of elementary school teachers is greater than the variation in the salari
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a

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e

There is sufficient evidence to support the researchers claim

Step-by-step explanation:

From the question we are told that

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 The sample variance for elementary school is  s^2_1 = 8324

 The second sample size is  n_2 = 30

  The sample variance for the secondary school is  s^2_2 = 2862

   The significance level is  \alpha = 0.05

The null hypothesis is  H_o :  \sigma^2_1 = \sigma^2 _2

The alternative hypothesis is H_a :  \sigma_1 ^2 > \sigma^2_2

Generally from the F statistics table  the critical value of \alpha = 0.05 at first and  second degree of freedom df_1 = n_1 - 1 = 30 - 1 = 29 and  df_2 = n_2 - 1 = 30 - 1 = 29 is  

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Generally from the value obtained we see that  F >  F_{critical } Hence

   The decision rule is  

Reject the null hypothesis

    The conclusion is  

  There is sufficient evidence to support the researchers claim

   

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2 years ago
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