What is the area of a circle with a circumference of 14π inches?

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问题 What is the area of a circle with a circumference of 14π inches?

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答案 The equation for the area of a circle is A=πr2. The equation for the circumference of a circle is C=2πr. Since you are given the circumference, you can use that to find the radius, r, and then use the radius to find the area: 14π=2πr 14=2r r=7 Now substitute r into the equation for area: Area=π(72) Area=49π

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What is the area of a circle with a circumference of 14π inches?

GRE QUANTITATIVE

GRE

Traditionally,universitieshavecarriedouttwomainactivities;researchandteaching.Manyexpertswouldarguethatboththes

On______sideofthestreetwerestandingyoungboysandgirlstowelcomethePresident.

Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewerebroughtupinthesameway

Televisionhasopenedwindowsineverybody’slife.Youngmenwillneveragaingotowarastheydidin1914.Millionsofpeople

Thankstothemeansofmoderntransportationandcommunication,theworldisgettingsmaller.Thewholeworldcommunityappears

Overtheyears,collegestudentshavestoodtogetherforwhattheybelievein,fromcivilrightstoanti-warpoliciestothemor

Textbookpricesaretraditionallyhigh."Combinedwiththerisingcostoftuition,thepriceofbooksforourstudentsisjust

HarrietBeecherStowehadpouredherheartintoheranti-slaverybook,UncleTom’sCabin.Butneithershenorherfirstpublish

Solvetheproblemandindicatethebestoftheanswerchoicesgiven.NUMBERS:Allnumbersusedarerealnumbers.FIGURES:

InGermanyherstartlingpowersasanovelistarewidely(i)____,butsheisalmostunknownintheEnglish-speakingworldbecaus

关于有机磷杀虫剂的叙述，错误的是

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