Question

I Need Help I Will Give Fan And Medals!

Answer 1

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

Answer 2

@hybrik

Answer 3

\[A = \pi r^2\]

Answer 4

ummmmm

Answer 5

=π·42≈50.26548

Answer 6

I don't get it.......

Answer 7

oh the answer is in pi so 42 pi is your answer

Answer 8

what don't you get?

Answer 9

oh

Answer 10

But 42 is not in the answers...

Answer 11

or 16 pi sry

Answer 12

Part A = pi r^2 = pi 4^2

Answer 13

as 4 is the radius

Answer 14

idk why I wrote 42 xD

Answer 15

Part B
the radius increases by 2
so area = pi * 6^2

Answer 16

@Chumpian How did you get that?

Answer 17

Part A

Answer 18

\[A = \pi r^2\] so 4 is the radius (r) and what's 4 squared?

Answer 19

16

Answer 20

yep and they want the answer in terms of pi so 16pi is your answer

Answer 21

Now i need part B

Answer 22

So again you use the equation \[A = \pi r^2\]

Answer 23

ok

Answer 24

They said they added two inches to the frame

Answer 25

so the radius is now 6

Answer 26

So what do you do next?

Answer 27

area = pi r^2 where r = radius
r is now 6
so its pi * 6^2 = 36 pi

Answer 28

Well I was gonna let her do that but thx xD

Answer 29

oh sorry

Answer 30

Ok sry what is going on?

Answer 31

@Chumpian

Answer 32

ok so the radius for part B is 6

Answer 33

ok

Answer 34

We are doing the same thing as we did in part A

Answer 35

ok

Answer 36

so what do we do with the radius that equals 6

Answer 37

idrk

Answer 38

\[A = \pi r^2\]

Answer 39

Ok but that is A

Answer 40

but we are doing the same thing as Part A but just with a larger radius

Answer 41

Ok

Answer 42

So when we plug in the 6 \[A = \pi 6^2\]

Answer 43

What do you do with the 6?

Answer 44

multiply is by itself
so 12

Answer 45

that would be 6 x 2 = 12 but squaring a number would be 6 x 6 = 36

Answer 46

Oh yea sorry

Answer 47

so then 36?

Answer 48

yep and they want it in terms of pi So your answer is?

Answer 49

36π

Answer 50

yep :)