A porch has the shape of a semicircle with a diameter of 7 ft.
What is the approximate area of the porch, rounded to the nearest square foot? Use 3.14 to approximate .
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OpenStudy (puppylover52):
@fairytail_lover
@YoungStudier
@haleyright
@jamye
OpenStudy (puppylover52):
I dont need the answer i need help
rebeccaxhawaii (rebeccaxhawaii):
okay well first get your radius which is half the diameter so 7/2=3.5
OpenStudy (puppylover52):
where did you get 2?
rebeccaxhawaii (rebeccaxhawaii):
the radius is half the diameter therefore 7/2 we are splitting it in half
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OpenStudy (puppylover52):
oh ok
rebeccaxhawaii (rebeccaxhawaii):
|dw:1462318233098:dw|
rebeccaxhawaii (rebeccaxhawaii):
the formula to find area for a circle is pi*r^2
so 3.14*3.5^2
OpenStudy (puppylover52):
i think its 5.495???
rebeccaxhawaii (rebeccaxhawaii):
\[3.5^2=3.5*3.5\]
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rebeccaxhawaii (rebeccaxhawaii):
what is 3.5*3.5=?
OpenStudy (puppylover52):
10.99
rebeccaxhawaii (rebeccaxhawaii):
please type it into your calculator. 3.5*3.5
OpenStudy (puppylover52):
I did
OpenStudy (puppylover52):
nvm
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rebeccaxhawaii (rebeccaxhawaii):
try again
OpenStudy (puppylover52):
12.25 sorry i read it wrong
rebeccaxhawaii (rebeccaxhawaii):
no no its okay. now multiply that by pi which is 3.14 so
12.25*3.14=?
OpenStudy (puppylover52):
38.465
rebeccaxhawaii (rebeccaxhawaii):
great so you round to the nearest square foot which is 38