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3 years ago

How do you sketch and label a trapezoid that has an area of 100 cm2

Mathematics

2 answers:

kirill115 [55]3 years ago

8 0

Answer:

if you want to sketch the trapezoid you will also need other dimensions like height and the length of the parallel sides

Nastasia [14]3 years ago

6 0

You need more lengths of the sides to be able to sketch it perfect. hope this helps have a blessed day

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It’s simple I swear!!! what is the square root of 25 times the square root of 9

goldenfox [79]

Answer:

Step-by-step explanation:

1st multiply the numbers: 25 × 9 = 225

2nd factor the number: 225 = √15^2

3rd apply radical rule: √15^2 = 15

Hope I helped :)

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3 years ago

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Write the number for one million six hundred thousand .

shtirl [24]

Answer:

1,600,000

Step-by-step explanation:

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Need your help asap trying to get 100%

marta [7]

Answer:

if he sells 12 every 8 months, supposing the trend continues, in 34 months he’ll sell...

12(properties) = 8 months

12/8 = 1 month

1 month = 1.5(properties)

2 months = 3 properties

(since 1.5 properties is unrealistic, but it helps in the math, to find for one month)

so for 34 months he’ll sell...

1.5*34 = 51 properties

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3 years ago

A sample of eight workers in a clothing manufacturing company gave the following figures for the amount of time(in minutes) need

lilavasa [31]

Answer:

$10.108 < \mu < 13.892$

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

We have the following distribution for the random variable:

$X \sim N(\mu , \sigma=0.45)$

And by the central theorem we know that the distribution for the sample mean is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

2) Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the mean and the sample deviation we can use the following formulas:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

$s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}$ (3)

The mean calculated for this case is $\bar X=12$

The sample deviation calculated $s=2.268$

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=8-1=7$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-T.INV(0.025,7)".And we see that $t_{\alpha/2}=2.36$