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ki77a [65]
3 years ago
5

A warehouse's rectangular ceiling measures 12 meters by 18 meters, and is covered by acoustic tile squares which are one meter o

n a side. Each piece of tile weighs a quarter of a kilogram. What will be the total weight of the tile required to cover the ceiling?
Mathematics
1 answer:
asambeis [7]3 years ago
3 0
The first thing to do is find the rectangular warehouse area.
 We have then:
 A = (12) * (18) = 216
 A = 216 m ^ 2
 We now look for the area of each acoustic tile square:
 A '= (1) ^ 2 = 1
 A '= 1 m ^ 2
 We look for acoustic tile squares number:
 N = (A) / (A ')
 N = (216) / (1)
 N = 216
 Finally we look for the total weight:
 W = (1/4) * (216)
 W = 54 Kg
 Answer:
 
The total weight of the tile required to cover the ceiling is:
 
W = 54 Kg
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Step-by-step explanation:

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3 years ago
Write an expression for the sequence of operations described below.
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Answer:

We conclude that:

''add 3 and the sum of 9 and v'' is algebraically represented by the expression as:

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Step-by-step explanation:

Given the statement

''add 3 and the sum of 9 and v''

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3 0
3 years ago
Some college graduates employed full-time work more than hours per week, and some work fewer than hours per week. We suspect tha
Alex_Xolod [135]

Answer:

a)Null hypothesis:\mu =40      

Alternative hypothesis:\mu \neq 40      

b) A Type of error I is reject the hypothesis that \mu is equal to 40 when is fact \mu is equal to 40c) We can commit a Type II Error, since by definition "A type II error is the non-rejection of a false null hypothesis and is known as "false negative" conclusion"Step-by-step explanation:Assuming this problem: "Some college graduates employed full-time work more than 40 hours per week, and some work fewer than 40 hours per week. We suspect that the mean number of hours worked per week by college graduates, [tex]\mu , is different from 40 hours and wish to do a statistical test. We select a random sample of college graduates employed full-time and find that the mean of the sample is 43 hours and that the standard deviation is 4 hours. Based on this information, answer the questions below"

Data given

\bar X=43 represent the sample mean

\mu population mean (variable of interest)

s=4 represent the sample standard deviation

n represent the sample size  

Part a: System of hypothesis

We need to conduct a hypothesis in order to determine if actual mean is different from 40 , the system of hypothesis would be:    

Null hypothesis:\mu =40      

Alternative hypothesis:\mu \neq 40      

Part b

In th context of this tes, what is a Type I error?

A Type of error I is reject the hypothesis that \mu is equal to 40 when is fact [tex]\mu is equal to 40

Part c

Suppose that we decide not to reject the null hypothesis. What sort of error might we be making.

We can commit a Type II Error, since by definition "A type II error is the non-rejection of a false null hypothesis and is known as "false negative" conclusion"

5 0
3 years ago
Read 2 more answers
I provided it in the picture, please help!
Goshia [24]
The answer would be D.
7 0
3 years ago
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