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erica [24]
3 years ago
12

Rewrite this radicand as two factors, one of which is a perfect square. √60

Mathematics
2 answers:
Sphinxa [80]3 years ago
5 0

Answer:

√4 * √15.

Step-by-step explanation:

√60

=√(4 * 15)

= √4 * √15

Morgarella [4.7K]3 years ago
5 0

Answer:

our answer is  \sqrt{4}*\sqrt{15} or in simplified form

as 2*\sqrt{15}

Step-by-step explanation:

\sqrt{60}

We need to solve the above expression

Factors of 60:

1X60,  2X30, 3X20, 4X15, 5X12, 6X10

We need two factors one of which is perfect square

From the above factors only 4X15 full fills our condition as 4 is a perfect square

\sqrt{60}\\ =\sqrt{4 * 15}\\ We\,\,know\,\, \sqrt{a*b}= \sqrt{a}*\sqrt{b}\\ =\sqrt{4}*\sqrt{15}\\

Solving, we get

2*\sqrt{15}

So, our answer is  \sqrt{4}*\sqrt{15} or in simplified form

as 2*\sqrt{15}

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3 years ago
An automobile manufacturer has given its van a 47.2 miles/gallon (MPG) rating. An independent testing firm has been contracted t
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Answer:

A

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B

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Step-by-step explanation:

From the question we are told that

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      The level of significance is  \alpha  =  0.02

Given that the value which the manufacturer gave the automobile is  47.2 and  it is believed that this is not correct, then  

The  Null Hypothesis is  

        H_o  :  \mu = 47.2

The alternative Hypothesis  is  

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The test statistics can be mathematically evaluated as  

        t  =  \frac{\= x- \mu}{\frac{\sigma }{\sqrt{n} } }

substituting values

        t  =  \frac{\= 47- 47.2}{\frac{1.9 }{\sqrt{250} } }

       t  = -1.7

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