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2 years ago

Why was it important for Washington to surround himself with brilliant people in his Cabinet?

1 answer:

7 0

Answer: President Obama makes a brief statement to the news media during a meeting ... lies the fallacy of the “surround myself with smart advisers” argument. ... in crisis management and a knack for hiring the right people to effectuate his policies. ... (Washington, Ulysses S. Grant, Zachary Taylor) or held important ...

Explanation:

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What impact did railroads have on cities across the United States at the turn of the twentieth century?

Strike441 [17]

Travel from place to place now became easier with the number of tracks that connected the states with each other. Apart from that, transport of products was now easier resulting in the increase of business all over the country thanks to the railroads.

4 0

2 years ago

A rectangular page is designed to contain 81 square inches of print. The margins at the top and bottom of the page are each 1 in

Nookie1986 [14]

Answer:

x = 11.02 inch by y = 7.35 inch

Explanation:

Let the width of the print be = x

Then the width of the page is x + (1.5+1.5) = x + 3

Let the height of the print be = y

Then the height of the page is y + (1+1) = y + 2

Given the area of the print is 81 square inches

That means, xy = 81

Therefore, y = $\frac{81}{x}$

Therefore, the area of the page is

A = (x + 3)(y + 2)

= (x + 3)( $\frac{81}{x}$ + 2)

Now for least amount of paper to be used,

$\frac{dA}{dx}=(x+3)(\frac{81}{x}+2)$

$\frac{dA}{dx}= \left (\frac{81}{x}+2 \right )+\left ( x+3 \right )\left ( -\frac{81}{x^{2}} \right )=0$

$\frac{81+2x}{x}=\frac{(x+3)(81)}{x^{2}}$

$81x+2x^{2}=81x+81\times 3$

$2x^{2}=243$

x = 11.02 inch

Now y = $\frac{81}{x}$

= $\frac{81}{11.02}$

= 7.35 inch

Therefore the dimensions of thr page for the least amount of paper is x = 11.02 inch by y = 7.35 inch

8 0

2 years ago

A survey asked 26 adults how many years of education they had. The sample mean was 13.03 with a standard deviation of 3.22. It i

yulyashka [42]

Answer: (11.95, 14.11)

Explanation:

Let x be a random variable that represent the number of years of education.

Given: Sample size : n= 26

Sample mean : $\overline{x}=13.03$

Sample standard deviation : s = 3.22

Significance level : $\alpha=100\%-90\%=10\%=0.1$

Degree of freedom: df = n-1 = 25

Critical t-value for $\alpha=0.1$ and df = 25 will be

$t_{\alpha/2, df}=t_{0.05,25}=1.7081$

90% confidence interval for mean:

$\overline{x}\pm t_{\alpha/2,df}\dfrac{s}{\sqrt{n}}\\\\=13.03\pm (1.7081)\dfrac{3.22}{\sqrt{26}}\\\\=13.03\pm (1.7081)\dfrac{3.22}{5.09902}\\\\=13.03\pm 1.08\\\\=(13.03-1.08,\ 13.03+1.08)\\\\ =(11.95,\ 14.11)$

A 90% confidence interval for the mean number of years of education = (11.95, 14.11)

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2 years ago

Healthy manpower is the foundation of national development.justify the statement<br>

ss7ja [257]

Answer:

healthy manpower is the foundation of national development because if there manpower between the citizen of country the country automatically become Development.ma'u does not abroad for their job .they can work in own country.

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2 years ago

What do the Mayan and Ancient Mesopotamian civilizations have in common?

Alik [6]

A is the answer to the question.

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2 years ago

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