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forsale [732]
2 years ago
5

Devon pays $8.16 for 12 pounds of sugar. What is the price for 10 pounds of sugar

Mathematics
2 answers:
zloy xaker [14]2 years ago
5 0

Answer:

$6.80

Step-by-step explanation:

$8.16 ÷ 12 = $0.68

$0.68 x 10 = $6.80

Rudik [331]2 years ago
3 0
The answer is $6.80 because you need to divide both by 12 then times by 10










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Answer:

a. Error is 0.14

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Requirement a)

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Given,

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= 0.98/√50

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Requirement b)

Given,

Standard deviation σ = 255

Population mean z = 1814

Size of the sample n = 50

We know, At 95% confidence interval,

(z-µ)/(σ/√n)  < Z_0.05

= - Z_0.05 < (z-µ)/(σ/√n) < Z_0.05

= - 1.96 * σ/√n < (z-µ)/(σ/√n)*  σ/√n  < 1.96 * σ/√n  [ in two tail Z test the value of Z_0.05 is 1.96 ]

= - 1.96 * 255/√50 < Z-µ <  1.96 * 255/√50

= -70.6828 < Z-µ < 70.6828

= 70.6828 > µ - Z > -70.6828

= 70.6828 + Z > µ > -70.6828 + Z

= 70.6828 + 1814 > µ > -70.6828 + 1814

=1913.68 > µ > 1772.32

So, the sample mean would be between 1913.68 to 1772.32.

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