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3 years ago

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Mathematics

2 answers:

Ilya [14]3 years ago

8 0

Answer:

Thank you very much.

Step-by-step explanation:

I needed it appreciate it.

nadya68 [22]3 years ago

6 0

Answer:hisagucbewqubcdbchcudwqv

Step-by-step explanation:

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A coin is flipped and a die is rolled find the probability of getting a head on the coin and a 4 on the die

skelet666 [1.2K]

Answer:

So for the head and tails one it is 1/1 chance of getting a head and for the dice on it is 1/21 that's the porbability hopes this helps :)

Step-by-step explanation:

5 0

3 years ago

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James Desreumaux, VP of Human Resources of American First Banks (AFB), is reviewing the employee training programs of AFB banks.

BartSMP [9]

Answer: (24.02,25.98)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given : Sample size : n= 100

Sample mean : $\overline{x}=25\text{ hours}$

Standard deviation : $\sigma=5\text{ hours}$

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

Critical value : $z_{\alpha/2}=1.96$

The confidence interval for population mean is given by :-

$\overline{x}\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=25\pm(1.96)\dfrac{5}{\sqrt{100}}\\\\=25\pm0.98\\\\=(25-0.98,\ 25+0.98)=(24.02,25.98)$

Hence, the 95% confidence interval for the population mean of training times is (24.02, 25.98).

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4 years ago

What is the sum of 13 5/7 + 13/28 ?

Arada [10]

Answer:397/28

Step-by-step explanation:

96/7+13/28

4 0

4 years ago

Write each fraction as a mixed number. <br> 5 3/5<br> 3 4/9 <br> 43/9<br> 32/5

AURORKA [14]

Answer:

5 3/5 is already a mixed number

3 4/9 is also already a mixed number

43/9 = 36/9 + 7/9 = 4 7/9

32/5 = 30/5 + 2/5 = 6 2/5

7 0

2 years ago

A circle has a circumference of 7.850 units. What is its radius?

Roman55 [17]

$\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=7.850 \end{cases}\implies 7.850=2\pi r\implies \cfrac{7.85}{2\pi }=r\implies 1.25\approx r$

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3 years ago

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