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2 years ago

Can you plz help with this?

Mathematics

2 answers:

Allisa [31]2 years ago

6 0

Answer:

Step-by-step explanation:

inverse property of addition is going back to zero with the equation so adding 2 to negative 2 will go back to zero

Anna71 [15]2 years ago

3 0

I believe the answer is D

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Exact value of 37.26 divided by 1.8 divided by 1000 is

Luden [163]

Answer:

0.0207

Step-by-step explanation:

$37.26 / 1.8 = 20.7\\$
$20.7 / 1000 = 0.0207\\$

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3 years ago

What is 2.75 in fraction form in simplest form

DanielleElmas [232]

2 3/4 would be 2.75 in simplest fraction form

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3 years ago

If you roll a 6 sided die 4 times what is the probability of getting 3 2’s

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Answer:

1/6 x 1/6 x 1/6 = 1/36 x 1/6 = 1/216

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Step-by-step explanation:

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3 years ago

A certain shampoo is available in two sizes. A 10.1-ounce bottle costs $2.53. A 23.7-ounce bottle costs $5.48. Find the unit pri

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Boo167

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Step-by-step explanation:

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3 years ago

A brochure claims that the average maximum height for a certain type of plant is 0.7 m. A gardener suspects that this is not acc

larisa [96]

Answer:

As $Z$ , it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.

Step-by-step explanation:

1. Relevant data:

$\mu=0.70\\N=40\\\alpha=0.05\\X=0.65\\s=0.20$

2. Hypotesis testing

$H_{0}=\mu=0.70$

$H_{1} =\mu< 0.70$

3. Find the rejection area

From the one tail standard normal chart, whe have Z-value for $\alpha=0.05$ is 1.56

Then rejection area is left 1.56 in normal curve.

4. Find the test statistic:

$Z=\frac{X-\mu_{0} }{\sigma/\sqrt{n}}$

$Z=\frac{0.65-0.70}{0.20/\sqrt{40}}\\Z=-1.58$

5. Hypotesis Testing

$Z_{\alpha}=1.56\\Z=-1.58$

$-1.58$

As $Z$ , it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.

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4 years ago