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Debora [2.8K]
3 years ago
12

What number can u multiply by √7 to get a rational number?

Mathematics
1 answer:
IceJOKER [234]3 years ago
3 0

sqrt(7) can be multiplied by 0 and sqrt 7 to become rational.

A and D

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An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such tha
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Answer:

Decision Rule; Reject H₀ if t > 1.708

Step-by-step explanation:

Given the data in the question;

sample size n = 26

sample mean x' = 4.9

Variance = 0.81

standard deviation σ = √variance = √0.81 = 0.9

level of significance ∝ = 0.05

Claim;

Null hypothesis             H₀ : μ = 4.6

Alternative hypothesis H₁ : μ > 4.6

Test Statistics;

Right tailed test

Now, decision rule for rejecting H₀;

degree of freedom df = n - 1 = 26 - 1 = 25

so, Right tailed test { > in H₁ }

Hence, Critical Value = t_{\alpha ,df = t_{0.05, 25 = 1.708

Decision Rule; Reject H₀ if t > 1.708

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What’s the common factor of 12,18 and 40?
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Answer:

The GCF for these numbers is 2.

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Answer:

180 to times 1/64  means  180 into 1/64 = 2.8125

Step-by-step explanation:

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