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2 years ago

I want to give brainliest one for every subject.

Mathematics

1 answer:

VikaD [51]2 years ago

6 0

Can you please give me brainiest :D

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(81/16)1/4 +(81/16)0<br>

Mila [183]

Answer:

should be 0.28125

Step-by-step explanation:

6 0

3 years ago

Is The Ratio 35 To 10 Proportional To The Ratio 7 To 5?Explain

SVEN [57.7K]

35 : 10 = 7*5 : 2*5 = 7 : 2

Thus 35 : 10 = 7 : 2;
but 35:10 ≠ 7:5

5 0

3 years ago

Mel is 3 years older than rahfat and Aurelio is twice as old as Mel. The sum of their ages is 57. How old is Mel

blagie [28]

Mel is 21......................................

7 0

3 years ago

A researcher takes a simple random sample of 83 homes in a city and finds that the mean square footage is 1628 with a standard d

Anna [14]

Answer: (1583.63, 1672.37)

Step-by-step explanation:

Given : Sample size : n= 83

Sample mean : $\overline{x}=1628$

Sample standard deviation : $\sigma=243$

The population standard deviation $(\sigma)$ is unknown .

The confidence interval for population mean :

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}$

For 90% confidence , significance level = $\alpha=1-0.90=0.10$

Using t-distribution table , Critical t-value = $t_{(\alpha/2, n-1)}=t_{0.05,82}=1.6636$

, where n-1 is the degree of freedom.

Now , 90% confidence interval for the mean square footage of all the homes in that city will be :-

$1628\pm (1.6636)\dfrac{243}{\sqrt{83}}\\\\ 1628\pm (1.6636)(26.672715)\\\\\\\\\approx1628\pm 44.37\\\\=(1628- 44.37,\ 1628+ 44.37)\\\\=(1583.63,\ 1672.37)$

Hence, the 90% confidence interval for the mean square footage of all the homes in that city = (1583.63, 1672.37)

7 0

3 years ago

Please help me it’s urgent

Aleks04 [339]

Answer:

Picture 1:( x-2.5)²+(y+5.5)²=225

Picture 2:( x-4)²+(y-1)²=25

Step-by-step explanation:

Use the rule: ( x-p)²+(y-q)² =r

( p,q)is the coordinate of the center of the circle

r is the radius of the circle

5 0

3 years ago