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3 years ago

A cylindrical can of baked beans has a diameter of 8 cm and a height of 9 cm.

1 answer:

7 0

Formula for volue of cylinder is area time height. Lets find area
A= $\pi r^2$
diameter=2r
8=2r
r=4
Now substitute r to $A= \pi r^2$
A= $\pi 4^2= 16\pi$
Now we have formula
V= $16 \pi *height=16 \pi *9=144 \pi$ - its the result, so B

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Beverly is painting a mural on a 1-square-meter section of a wall. She has completed a rectangular part of the mural that's is 5

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Answer:

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Step-by-step explanation:

Area of the section of wall = 1 square meter

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2 years ago

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Step-by-step explanation:

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3 years ago

The estimated daily living costs for an executive traveling to various major cities follow. The estimates include a single room

Alexandra [31]

Answer:

$\bar x = 260.1615$

$\sigma = 70.69$

The confidence interval of standard deviation is: $53.76$ to $103.25$

Step-by-step explanation:

Given

$n =20$

See attachment for the formatted data

Solving (a): The mean

This is calculated as:

$\bar x = \frac{\sum x}{n}$

So, we have:

$\bar x = \frac{242.87 +212.00 +260.93 +284.08 +194.19 +139.16 +260.76 +436.72 +355.36 +.....+250.61}{20}$

$\bar x = \frac{5203.23}{20}$

$\bar x = 260.1615$

$\bar x = 260.16$

Solving (b): The standard deviation

This is calculated as:

$\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n-1}}$

$\sigma = \sqrt{\frac{(242.87 - 260.1615)^2 +(212.00- 260.1615)^2+(260.93- 260.1615)^2+(284.08- 260.1615)^2+.....+(250.61- 260.1615)^2}{20 - 1}}$ $\sigma = \sqrt{\frac{94938.80}{19}}$