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Mathematics 8 Online
OpenStudy (anonymous):

alan needs posts to fence his 12 m by 10-m lot. IF he allows a distance of 1 m between the posts, how many posts will he have.

jigglypuff314 (jigglypuff314):

so find the perimeter. perimeter = all the sides added up |dw:1389495870379:dw|so what is 12+12+10+10?

OpenStudy (anonymous):

so there are 44 posts

jigglypuff314 (jigglypuff314):

yep :)

OpenStudy (anonymous):

Which has the largest area.

jigglypuff314 (jigglypuff314):

are there options? :)

OpenStudy (anonymous):

what is the ormula to find the circumference o a circle

jigglypuff314 (jigglypuff314):

the formula for the circumference of a circle is 2 pi r where "r" = radius

OpenStudy (anonymous):

answer on the 2 one

jigglypuff314 (jigglypuff314):

huh?

OpenStudy (anonymous):

please emonstrate

jigglypuff314 (jigglypuff314):

if a circle has a radius of 5 |dw:1389496779042:dw|then the circumference would be 2 times pi times (5) which would be simplified to 10pi

OpenStudy (anonymous):

what is the are o circle its diameter is 8m

jigglypuff314 (jigglypuff314):

area of a circle is radius times radius times pi diameter is 2 times radius so since radius is half of the diameter when the diameter is 8 then radius is 4 then area = 4 times 4 times pi simplified would be = 16pi

OpenStudy (anonymous):

the radius o the circular pool is 3.5.what is its circumference

jigglypuff314 (jigglypuff314):

circumference = 2 times pi times r when r represents radius so when radius = 3.5 circumference = 2 times (3.5) times pi = 7pi

OpenStudy (anonymous):

coices a.20.98 b.21.98 c.22.98 d.23.98

jigglypuff314 (jigglypuff314):

7 times 3.14 =

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