Mathematics, 28.01.2020 13:58 scholar13

This cylinder is 7 in tall and has a volume of 63pi in3 what is the area of the cross section

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Answer from: 2002babygurl

area of cross section of cylinder is $9\pi$ inch²

Step-by-step explanation:

Given : Cylinder is 7 inch tall and has a volume of $63\pi$ inches³.

We have to find the area of cross section of cylinder.

Area of cross section of cylinder = $\pi r^2$

To find the cross section first find radius.

Given Volume of cylinder = $63\pi$ inches³

Also , Volume of cylinder = $\pi r^2h$

Thus, $\Rightarrow 63\pi=\pi r^2h$

$\Rightarrow 63=r^2(7)$

Divide both side by 7, we get,

$\Rightarrow 9=r^2$

On simplifying , we get,

$\Rightarrow r=\pm 3$

Since, radius has to be positive, thus neglecting negative term.

Thus, radius of cylinder = 3 inch

Thus, area of cross section of cylinder = $\pi r^2$

area of cross section of cylinder = $\pi (3)^2=9\pi$

Thus, area of cross section of cylinder is $9\pi$ inch²

Answer from: Quest

"it's not the heat, it's the humidity". that's a partly valid phrase you may have heard in the summer, but it's actually both. the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. this has important considerations for the human body's comfort. when the body gets too hot, it begins to perspire or sweat to cool itself off. if the perspiration is not able to evaporate, the body cannot regulate its temperature. evaporation is a cooling process. when perspiration is evaporated off the body, it effectively reduces the body's temperature. when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases. in other words, the human body feels warmer in humid conditions. the opposite is true when the relative humidity decreases because the rate of perspiration increases. the body actually feels cooler in arid conditions. there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation:

75% of the temperatures are below what value? how do you know? 75% of the temperatures are above w

Answer from: Quest

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

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