horsegal244
  • horsegal244
I Need Help I Will Give Fan And Medals!
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
horsegal244
  • horsegal244
A circular picture is 8 inches in diameter. Part A What is the area of the picture in square inches? A. 4π square inches B. 8π square inches C. 16π square inches D. 32π square inches Part B A frame that is 2 inches wide surrounds the picture. What is the total area of the picture and the frame in square inches? A. 4π square inches B. 12π square inches C. 36π square inches D. 40π square inches
horsegal244
  • horsegal244
@hybrik
anonymous
  • anonymous
\[A = \pi r^2\]

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More answers

horsegal244
  • horsegal244
ummmmm
anonymous
  • anonymous
=π·42≈50.26548
horsegal244
  • horsegal244
I don't get it.......
anonymous
  • anonymous
oh the answer is in pi so 42 pi is your answer
anonymous
  • anonymous
what don't you get?
horsegal244
  • horsegal244
oh
horsegal244
  • horsegal244
But 42 is not in the answers...
anonymous
  • anonymous
or 16 pi sry
welshfella
  • welshfella
Part A = pi r^2 = pi 4^2
welshfella
  • welshfella
as 4 is the radius
anonymous
  • anonymous
idk why I wrote 42 xD
welshfella
  • welshfella
Part B the radius increases by 2 so area = pi * 6^2
horsegal244
  • horsegal244
@Chumpian How did you get that?
horsegal244
  • horsegal244
Part A
anonymous
  • anonymous
\[A = \pi r^2\] so 4 is the radius (r) and what's 4 squared?
horsegal244
  • horsegal244
16
anonymous
  • anonymous
yep and they want the answer in terms of pi so 16pi is your answer
horsegal244
  • horsegal244
Now i need part B
anonymous
  • anonymous
So again you use the equation \[A = \pi r^2\]
horsegal244
  • horsegal244
ok
anonymous
  • anonymous
They said they added two inches to the frame
anonymous
  • anonymous
so the radius is now 6
anonymous
  • anonymous
So what do you do next?
welshfella
  • welshfella
area = pi r^2 where r = radius r is now 6 so its pi * 6^2 = 36 pi
anonymous
  • anonymous
Well I was gonna let her do that but thx xD
welshfella
  • welshfella
oh sorry
horsegal244
  • horsegal244
Ok sry what is going on?
horsegal244
  • horsegal244
@Chumpian
anonymous
  • anonymous
ok so the radius for part B is 6
horsegal244
  • horsegal244
ok
anonymous
  • anonymous
We are doing the same thing as we did in part A
horsegal244
  • horsegal244
ok
anonymous
  • anonymous
so what do we do with the radius that equals 6
horsegal244
  • horsegal244
idrk
anonymous
  • anonymous
\[A = \pi r^2\]
horsegal244
  • horsegal244
Ok but that is A
anonymous
  • anonymous
but we are doing the same thing as Part A but just with a larger radius
horsegal244
  • horsegal244
Ok
anonymous
  • anonymous
So when we plug in the 6 \[A = \pi 6^2\]
anonymous
  • anonymous
What do you do with the 6?
horsegal244
  • horsegal244
multiply is by itself so 12
anonymous
  • anonymous
that would be 6 x 2 = 12 but squaring a number would be 6 x 6 = 36
horsegal244
  • horsegal244
Oh yea sorry
horsegal244
  • horsegal244
so then 36?
anonymous
  • anonymous
yep and they want it in terms of pi So your answer is?
horsegal244
  • horsegal244
36π
anonymous
  • anonymous
yep :)

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