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2 years ago

Please help fast mathswatch!! I

Mathematics

2 answers:

netineya [11]2 years ago

4 0

Answer:

Step-by-step explanation:

find the volume of one and multiply by six

6 * 2 * 2 * 12 =

288 cm³

SSSSS [86.1K]2 years ago

3 0

Answer:

288 cm^3

Step-by-step explanation:

The formula for a volume of a prism is Base x Height.

In this question, the base is the shape that is made of 6 identical squares, and the height is 12cm.

First, let's start by finding the area of the base. One square is 2 x 2, which is 4. Since there are 6 of those, we multiply 4 and 6. That equals 24cm^2.

We can know that 24cm^2 is the area of the base.

Since the height is 12cm, we can multiply 24 and 12. 24 x 12 is 288, so that is our final answer!

The volume of the prism given is 288^3.

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An analytical laboratory is asked to evaluate the claim that the concentration of the active ingredient in a specimen is 86%. Th

Olenka [21]

Answer:

Decision rule

Reject null hypothesis

Conclusion

There is significance evidence that the true mean is different from 0.86

Step-by-step explanation:

From the question we are told that

The population mean $\mu = 0.86$

The sample is mean is $\= x = 0.8708$

The standard deviation is $\sigma = 0.0068$

The level of significance is $\alpha = 0.01$

The sample size n = 3

The null hypothesis is $\mu = 0.86$

The alternative hypothesis is $\mu \ne 0.86$

Generally the test statistics is mathematically represented as

$z = \frac{\= x - \mu }{ \frac{\sigma}{\sqrt{n} } }$

=> $z = \frac{ 0.8708 - 0.86 }{ \frac{0.0068}{\sqrt{3} } }$

=> $z = 2.751$

Generally p- value is mathematically represented as

$p-value = 2 P(z >2.751 )$

From the z-table

$P(z >2.751 ) = 0.0029707$

$p-value = 2 * 0.0029707$

=> $p-value = 0.00594$

From the obtained question we see that $p-value < \alpha$

Hence we reject the null hypothesis

6 0

3 years ago

A rectangle has a length of x+ 4 centimeters and a width of x centamentere the perimeter of the rectangle is 28cm what is the va

Mashutka [201]

Answer: The perimeter of the rectangle is 28 centimeters.

Step-by-step explanation: I hope this helps-

6 0

3 years ago

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Which symbol makes this statement true? 2/3 ____ 50% <, >, =

SSSSS [86.1K]

Answer:

Step-by-step explanation:

2/3 = 0.666666...

50% = 0.5

0.6666...>0.5

Therefore, 2/3>50%

5 0

3 years ago

Find the missing variable for a parallelogram: A = 28in2 h = b = 6.3 in (1in=2.54cm)

aivan3 [116]

The formula of an area of parallelogram:

$A=bh$

We have

$b=6.3\ in$ and $A=28\ in^2$

Substitute:

$6.3h=28$ divide both sides by 6.3

$h=\dfrac{28}{6.3}\\\\h=\dfrac{280}{63}\\\\h=4\dfrac{28}{63}\\\\h=4\dfrac{28:7}{63:7}\\\\h=4\dfrac{4}{9}$

Answer: $h=4\dfrac{4}{9}\ in$

4 0

4 years ago

Please show the work on answer

krek1111 [17]

Answer:

what's the question

Step-by-step explanation:

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2 years ago

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