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3 years ago

How do the products 4.3 x 0.56 and 0.43 x 5.6 compare? Explain.

Mathematics

1 answer:

Tems11 [23]3 years ago

3 0

They are all the same numbers just that 0.43 is rounded

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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

BartSMP [9]

Answer:

The decision rule is

Reject the null hypothesis

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 5.6 \ pounds/inch^2$

The sample size is n = 160

The sample mean is $\= x = 5.7 \ pounds/ inch^2$

The variance is $\sigma ^2 = 0.25$

The level of significance is $\alpha = 0.01$

The null hypothesis is $H_o : \mu = 5.6$

The alternative hypothesis is $H_a : \mu > 5.6$

Generally the standard deviation is mathematically represented as

$\sigma = \sqrt{\sigma ^2 }$

=> $\sigma = \sqrt{0.25 }$

=> $\sigma = 0.5$

Generally the test statistics is mathematically represented as

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

=> $z = \frac{5.7 - 5.6 }{ \frac{0.5 }{\sqrt{ 160 } } }$

=> $z = 2.53$

From the z table the area under the normal curve to the left corresponding to 2.53 is

$p-value = P(Z > 2.53 ) =0.0057$

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

The decision rule is

Reject the null hypothesis

The conclusion is

There is sufficient evidence to conclude that the believe that the valve performs above the specifications is true

5 0

2 years ago

Use this method to estimate the students who attend your school (or a certain building on your campus) on a given morning. Count

Karolina [17]

Answer and explanation:

The data we get from counting how many people entering a building in one minute is the sample of the population size. We do this since it would be tedious or not feasible to stand and count one by one how many people enter the building and so we do a good estimate with our one minute sample

Let's assume in one minute, 15 people enter the building and it takes one hour for everyone to enter the building

Population size would be 15*60 minutes= 900 people

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2 years ago

8 + 3x=29 +2x <br> I need answer ASAP

borishaifa [10]

Answer:

x = 21

Step-by-step explanation:

8 + 3x = 29 + 2x

8 + 3x - 2x = 29

8 + x = 29

x = 29 - 8 = 21

x = 21

3 0

2 years ago

Jane paid $35 for her meal. If the cost of the meal was $30 , what was the tax rate.

marta [7]

5 dollars because she paid 30 for the meal

6 0

2 years ago

Read 2 more answers

Can someone please answer this i will give brainliest if i can

Daniel [21]

Answer:

For bag C

Step-by-step explanation:

Bag C has more blue marbles than red ones

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2 years ago