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3 years ago

Please answer my question!

Mathematics

1 answer:

Salsk061 [2.6K]3 years ago

6 0

D is not a terminating decimal because it repeats *hint the dash mark above the 4*

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Write an expression that can be used to find the perimeter of the dog park for any value x.

defon

Answer:

x+x+x+x if its a rectangle or square

7 0

3 years ago

Read 2 more answers

A random sample of 56 lithium batteries has a mean life of 645 hours with a population standard deviation of 31 hours. Compute t

bearhunter [10]

Answer: A. (636.9, 653.1)

Step-by-step explanation:

Given : Sample size : n=56

Significance level : $\alpha: 1-0.95=0.05$

Critical value : $z_{0.05}=1.96$

Sample mean : $\overline{x}=645\text{ hours}$

Standard deviation : $\sigma= 31\text{ hours}$

The 95% confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm (1.96)\dfrac{31}{\sqrt{56}}\\\\=645\pm8.1\\\\=(636.9, 653.1)$

Hence, 95% confidence interval for population mean is (636.9, 653.1).

8 0

3 years ago

Identify the property shown .<br><br> 50+0=50

qwelly [4]

The identity property is shown

7 0

3 years ago

Please help !! Don’t understand:((

vovikov84 [41]

Answer:

B

Explanation:

Exponents outside of the parentheses have to be distributed to all of the terms inside of the parentheses. So, B is equivalent because it is simply just the version that has the exponent distributed.

6 0

3 years ago

J=UC solve for c please

mart [117]

»»————-　★　————-««

I believe your answer is:

$c=\frac{j}{u}; u\neq 0$

»»————-　★　————-««

Here’s why:

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$\boxed{\text{Solving for 'c'...}}}\\\\j = uc \\------------\\\rightarrow \frac{j=uc}{u}\\\\\rightarrow \frac{j}{u}=c\\\\\rightarrow \boxed{c=\frac{j}{u}}}; u\neq 0$

⸻⸻⸻⸻

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

8 0

3 years ago