The heat of the sun penetrates the atmosphere and warms the Earth's surface. The warmed rEarth Radiates and this heat back into the atmosphere.The gases the surround the atmosphere such as carbon dioxide , methane , nitrous oxide and water vapour absorb some of the radiated heat and send it back to the Earth . This<em> trapping of heat from the Sun by excess carbon dioxide and other gases present in the atmosphere</em> is known as the <u>greenhouse effect</u>. The gases involved in the phenomenon are called <u>greenhouse gases.</u>
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By definition of conditional probability,

Similarly,

Answer:
Circumference is 18.84 feet. Area is 28.26 square feet.
Step-by-step explanation:
Given:
Radius of the circle, 
The value of
is 3.14.
Now, circumference of a circle of radius
is given as:

Also, area of the circle of radius
is given as:

Therefore, the circumference of the circle is 18.84 feet and area of the circle is 28.26 square feet.
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