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3 years ago

A factory buys the box it needs in the form of flat nets what advantges might they have in doing this

1 answer:

8 0

Because they are using flat nets they may be able to get more boxes per area of cardboard purchased instead of purchasing the boxes and losing some extra cardboard from a cutting or gluing process. the flat nets may also be cheaper to ship or take less area than boxes shipped whole.

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A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with A random s

wel

Answer:

95%: (3278.354 ; 3270.083)

99% : (3221.646 ; 3278.354)

Step-by-step explanation:

Given :

Sample size, n = 12

Mean, xbar = 3250

Sample standard deviation = √1000

The 95% confidence interval :

Mean ± Margin of error

Margin of Error = Tcritical * s/√n

Tcritical at 0.05, df=12-1 = 11 ;

Tcritical at 95% = 2.20

Hence,

Margin of Error = (2.20 * √1000/√12) = 20.083

Confidence interval : 3250 ± 20.083

Lower boundary = 3250 - 20.083 = 3229.917

Upper boundary = 3250 + 20.083 = 3270.083

2.)

The 99% confidence interval :

Mean ± Margin of error

Margin of Error = Tcritical * s/√n

Tcritical at 0.01, df=12-1 = 11 ;

Tcritical at 99% = 3.106

Hence,

Margin of Error = (3.106 * √1000/√12) = 28.354

Confidence interval : 3250 ± 28.354

Lower boundary = 3250 - 28.354 = 3221.646

Upper boundary = 3250 + 28.354 = 3278.354

3 0

3 years ago

How many 1/4 pound hamburgers can you make from 3 1/2 pound of ground beef

Anna71 [15]

Answer:

Step-by-step explanation:

Divide 3 1/2 into 1/4

5 0

3 years ago

Read 2 more answers

I need help with math ...x+180+1.5x+3x=455

kirill115 [55]

5.5x+180=455
5.5x=275
The answer is X=50

8 0

3 years ago

Eight hundred registered voters were asked whether they would vote yes or no on a certain measure. If 38% of those polled said y

Ivan

100%-38%= 62%
To find the decimal of 62%, we will have to divide 62 by 100 to get 0.62.

0.62(800)= 496.

Therefore, 496 people will vote no.

Hope this helps!

6 0

3 years ago

Read 2 more answers

A package of aa batteries costs 3.50 plus an additional 6% tax. What is the price after tax?

Fiesta28 [93]

6% tax means 6% of $3.50

Convert 6% to decimal (move decimal 2 spots to the left): 6% ⇒ .06

Multiply 3.50 with .06 = .21 <-- That's .21 cents of 3.50

That means you have to pay an extra 21 cents. Add that to the $3.50 you had to pay.

$3.50 + $0.21 = $3.71 <-- Price after tax

6 0

3 years ago

Read 2 more answers