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svetlana [45]
3 years ago
12

What is 212.8 divided by 3.8? Plz Help!!

Mathematics
2 answers:
otez555 [7]3 years ago
6 0
Easy.

212.8 divided by 3.8 is equivilant to 56. You would solve this by working a long division equation. Please give brainliest, I really need virtuoso.
kakasveta [241]3 years ago
3 0
212.8 divided by 3.8 equals 56. Hope this helped have a good day!
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Find the area of the semicircle with the diameter of 40cm
tresset_1 [31]

Answer:

628.4 cm²

Step-by-step explanation:

Area of semicircle : (πr^2)/2

(3.152*(20^2)) / 2

(3.142 *400) /2

1256.8 / 2

628.4

7 0
4 years ago
Any good mathematicians out there that would help me understand this concept?
algol [13]

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4 0
3 years ago
The equation y = 17x shows that a boat travels at a speed of 17 km/h. Which ordered pair satisfies the equation y = 17x? A. (0,
aleksklad [387]
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3 years ago
What is 4+5 devices by two
icang [17]

The equation can be written as:

4 + 5 / 2

Remember to follow PEMDAS.

4 + 5 / 2

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3 0
3 years ago
Read 2 more answers
A random sample of 130 students is chosen from a population of 4,500 students. The mean IQ in the sample is 120, with a standard
barxatty [35]

Answer:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

Step-by-step explanation:

Information given

\bar X= 120 represent the sample mean

\mu population mean (variable of interest)

s=5 represent the sample standard deviation

n=130 represent the sample size  

For this case we can't set a margin of error just with a % since they not specify 1.13% respect to something for this case we can omit this value

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)

The degrees of freedom are given by:

df=n-1=130-1=129

The Confidence level is 0.99 or 99%, the significance would be \alpha=0.01 and \alpha/2 =0.005, and the critical value would be t_{\alpha/2}=2.614

And replacing we got:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

3 0
3 years ago
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