Question

The radius of the bull’s-eye of the dartboard is 8 inches. The radius of each concentric circle is 8 inches more than the radius of the circle inside it. If a dart lands at random on the dartboard, what is the probability that the dart will hit in area C?



A. 9/16

B. 5/16

C. 1/4

D. 3/4

Answer 1

would it be 1/4? not sure

Answer 2

I think you need to get the area of the circle in this

Answer 3

okay, i got 64 for the area :)

Answer 4

just a is pi8^2 a and b is pi16^2 and so on ...do those really quick

Answer 5

wait , im lost, do what now exactly?

Answer 6

find the area of the entire dartboard..do you know how?

Answer 7

do i add 8 each time i go to do pie since it said it increases 8 each time?

Answer 8

if the radius of each area is 8 more than the last that means a is 8 ...a+bs radius is 16 ..a+b+c+ds is 32 ..so Pi32^2 is ?

Answer 9

i got 1024

Answer 10

is this correct?

Answer 11

no..tell me how you got that?

Answer 12

i did 3.14*32^2

Answer 13

32^2 is 1024 :)

Answer 14

1024 x 3.14 is?

Answer 15

3215.36 , i put it in seperately this time :)

Answer 16

wait i dont think thats right , hold on.

Answer 17

haha it was ..you are fine..

Answer 18

oh yay!

Answer 19

now that was abcd all together .... what you need to do ..is take off all but c . ..so first you need to get abc so that is pi24^2

Answer 20

1808.64?

Answer 21

correct..and then subtract it from ab or pi 16^2

Answer 22

1005? i got 803 when i did (pi) 16^2

Answer 23

1004.8 to be exact
now that is the portion of the total you need to hit c ...... so 1004.8 / 3215.36 is?

Answer 24

0.3125

Answer 25

which as a fraction is which one? if you put those fractions in a calc they will convert to decimels i believe

Answer 26

B 5/16 :)

Answer 27

Correct :)

Answer 28

So do you understand it?

Answer 29

yes i understand now , thanks a million! :)