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Mathematics 8 Online
OpenStudy (anonymous):

The lid for a circular plastic food container has a diameter of 9 cm. What is the approximate area of the top of the lid? Use 3.14 to approximate pi and round your answer to the nearest hundredth. ___________________cm2 (the 2 is small) PLZ HELP< ASAO< NO GUESSING PLZ< I WILL GIVE MEDAL

OpenStudy (anonymous):

@brittanydosey @mathmath333 @welshfella

OpenStudy (anonymous):

@Quan99 @Unanimoose

OpenStudy (anonymous):

@omarbirjas @pooja195 @Phebe @pitamar @pitamar @KJ4UTS @Jaynator495 @NadiaElhaj_1 @mikkel900 @brittanydosey @viixxen @chainedecho @Destinymasha @Deadpool.

OpenStudy (unanimoose):

Just find the area of the circle with a diameter of 9.

OpenStudy (unanimoose):

\[A = r^2\pi\]

OpenStudy (anonymous):

@Destinymasha , do u go to k12, and r in Ms. Au's class??

OpenStudy (anonymous):

okay can u guid me through it plz?

OpenStudy (unanimoose):

Using 3.14 as pi.

OpenStudy (unanimoose):

Remember that the radius is HALf of the diameter.

OpenStudy (anonymous):

I got 63.585 is that it?????

OpenStudy (anonymous):

9 divided by 2 is 4.5

OpenStudy (anonymous):

4.5(2) times 3.14

OpenStudy (anonymous):

and i got 63.585

OpenStudy (anonymous):

so if i round to the nearest hundredth then that would be the same exactly right??

OpenStudy (anonymous):

or would it be 63.600 or just plain 64

OpenStudy (anonymous):

uggghhh, i am not good at math as u can see ;)

OpenStudy (anonymous):

@linastar13

OpenStudy (anonymous):

@welshfella

OpenStudy (mathstudent55):

You are correct up to A = 63.585 cm^2 Now you need to round off to the nearest hundredth.

OpenStudy (welshfella):

the area is 3.14 8 radius squared that is 3.14*4.5*4.5

OpenStudy (mathstudent55):

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