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3 years ago

Help help help!!!!!!!!! 7√96m³

Mathematics

2 answers:

marissa [1.9K]3 years ago

8 0

If we’re simplifying the root, then it would be 4m times the square root of 6m.

harkovskaia [24]3 years ago

6 0

Answer:

6584.22

Step-by-step explanation:

used a calculator (ti-84 plus tx instruments)

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a shopkeeper bought two watches for rs 400.he sold them to gain 5% profit on one and another at 5% loss on other.calculate his f

jekas [21]

Answer:

0.25 % loss.

Step-by-step explanation:

Let the cost of 1 watch be rs x then the cost of the other is rs 400 - x.

Let the sp be rs y.

So we have:

y = x + 0.05x

y = (400 - x) - 0.05(400 - x)

y = 400 - x - 20 + 0.05x

y = 380 - 0.95x

So x + 0.05x = 380 - 0.95x

2x = 380

x = 190.

and y = 190 + 0.05*190 = 199.5.

So the total selling price = 2 * 199.5 = rs 399

So final loss is [ (400-399)/ 400] * 100

= 0.25 %.

8 0

3 years ago

How do you mark brainiest answer?

Hoochie [10]

Answer:

there's a blue crown that shows up when either 2 people already answered or if it's been a few days since only 1 person answered, just click that

Step-by-step explanation:

idk if u know this but apparently u gain points for marking someone brainliest, i read that somewhere but i could be wrong

8 0

3 years ago

What is the diameter of a circle with a circumference of 282.6 m? round your answer to the nearest meter.

sergejj [24]

m I think I'm not really sure sorry if I'm wrong.

7 0

4 years ago

Two cars leave towns 300 kilometers apart at the same time and travel toward each other. One car's rate is 10 kilometers per hou

mel-nik [20]

$300 \div 120 = 2.5$
so 2.5 kilometers per second

3 0

3 years ago

In selecting a sulfur concrete for roadway construction in regions that experience heavy frost, it is important that the chosen

Lesechka [4]

Step-by-step explanation:

Given - In selecting a sulfur concrete for roadway construction in regions that experience heavy frost, it is important that the chosen concrete has a low value of thermal conductivity in order to minimize subsequent damage due to changing temperatures. Suppose two types of concrete, a graded aggregate and a no-fines aggregate, are being considered for a certain road. The table below summarizes data on thermal conductivity from an experiment carried out to compare the two types of concrete.

Type ni xi si

Graded 42 0.486 0.187

No-fines 42 0.359 0.158

To find - a. Formulate the above in terms of a hypothesis testing problem.

b. Give the test statistic and its reference distribution (under the null hypothesis).

c. Report the p-value of the test statistic and use it to assess the evidence that this sample provides on the scientific question of difference in mean conductivity of the two materials at the 5% level of significance.

Proof -

a.)

Hypothesis testing problem :

H0 : There is significant difference between mean conductivity for the graded concrete and mean conductivity for the no fines concrete.

H1 : There is no significant difference between mean conductivity for the graded concrete and mean conductivity for the no fines concrete.

Test statistic :

$Z = \frac{x_{1} - x_{2} }{\sqrt{\frac{s_{1} ^{2} }{n_{1}} + \frac{s_{2}^{2} }{n_{2}} } }$

$Z = \frac{0.486 - 0.359 }{\sqrt{\frac{0.03496 }{42} + \frac{0.02496 }{42} } }$

$Z = \frac{0.127 }{\sqrt{0.001468}}$

$Z = \frac{0.127 }{0.0377}$

⇒Z(cal) = 3.3687

Z(tab) = 1.96

As Z (cal) > Z(tab)

So, we reject H0 at 5% Level of significance

p-value = 0.99962

Hence

There is significant difference in mean conductivity at the two materials.

5 0

3 years ago