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3 years ago

Help on these plzzzzz it is really hard

Mathematics

1 answer:

velikii [3]3 years ago

7 0

11.

Lateral area of a cube is 4*[(2.5)^2] = 4*6.25 = 25 cm^2; B

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13 inches = __ ft<br> PLS HELP PLS

Radda [10]

Answer:

1.083

Step-by-step explanation:

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3 years ago

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Please help with this! It's due soon! Braileist or however you spell it will be given! I'm not the brightest and have other work

egoroff_w [7]

Answer:

Step-by-step explanation:

So, we se that there are 8 parts in total.

So, 50/8 is 6.25

So, 6.25*3 parts, which is how many there are for blue is 18.75

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3 years ago

What is the answer to 3x –7 = -16

Anni [7]

Answer:

x = -3

Step-by-step explanation:

3x –7 = -16

3x = -16 + 7

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3 years ago

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The annual water usage in rockport increases at a rate of 10% every year as the town gets bigger. this year, the town used 6,740

Finger [1]

Answer:

Step-by-step explanation:

<h3> I=PRT/100</h3><h2> 6740×<u>1</u><u>0</u>×7</h2><h2> 100</h2><h2> 674×1×7</h2><h2> 4618</h2><h2>the nearest hundredth is a 46•18 this is my answer</h2>

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2 years ago

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 280 engines

DENIUS [597]

Answer:

The value of the test statistic is $t = -2.09$

Step-by-step explanation:

The null hypothesis is:

$H_{0} = 6.6$

The alternate hypotesis is:

$H_{1} \neq 6.6$

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation(square roof of the variance) and n is the size of the sample.

In this problem, we have that:

$X = 6.5, \mu = 6.6, \sigma = \sqrt{0.64} = 0.8, n = 280$

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{6.5 - 6.6}{\frac{0.8}{\sqrt{280}}}$

$t = -2.09$

The value of the test statistic is $t = -2.09$

4 0

4 years ago