Andy would like to put a row of decorative tile around his circular pole. the radius of a pole is 5 feet. if the tile cost 12 dollars per foot how much will the tile cost?
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OpenStudy (anonymous):
C=2pi*r
C=2*3.14*5
C=2*15.7
C=31.4 ft.
31.4*12=$376.8 cost of the tile
is this correct ???
OpenStudy (anonymous):
@Mertsj can you check my answer please
jimthompson5910 (jim_thompson5910):
that is correct
OpenStudy (anonymous):
thanks
jimthompson5910 (jim_thompson5910):
np
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OpenStudy (mertsj):
yes. Good job.
OpenStudy (anonymous):
can you help me on the next one ?
OpenStudy (mertsj):
possibly
OpenStudy (anonymous):
let me know if its blurry
jimthompson5910 (jim_thompson5910):
find the circumference and divide by 4
or
find the circumference and multiply by (90/360)
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OpenStudy (anonymous):
using 4 as the diameter ?
jimthompson5910 (jim_thompson5910):
4 is the radius
OpenStudy (anonymous):
25.12
OpenStudy (anonymous):
you said divide by 4. so that turns out to be 6.28
jimthompson5910 (jim_thompson5910):
good
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jimthompson5910 (jim_thompson5910):
now convert that to a mixed number
jimthompson5910 (jim_thompson5910):
the closest you get is 6 2/7
according to these answer choices
jimthompson5910 (jim_thompson5910):
it's not a perfect fit, but it's close enough
OpenStudy (anonymous):
it says to use pi =22/7 .. does that make a difference ?
jimthompson5910 (jim_thompson5910):
oh yes it makes a slight difference, but you'll still get 6 2/7
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