PLEASE HELP ME!!!
In a recent election, there were six candidates and 5100 total votes. The circle graph below summarizes the votes by candidate.
The central angle for the DeWitt slice is 25.2 degrees . How many of the votes did DeWitt get?

- anonymous

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- anonymous

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- anonymous

if u click on the link that says mathgraph the graph will get bigger. i know its hard to see right now.

- anonymous

and btw, cental angle = 360 degrees

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- radar

ratio of 25.2 to 360
is the same as x to 5100

- anonymous

so what do i do?

- radar

25.2:360 :: x:5100
or 25.2 x
------- = -------
360 5100

- anonymous

then cross multiply?

- radar

360x=5100 * 25.2

- radar

Yes

- anonymous

is the * a multiplication?

- radar

yes

- anonymous

so the answer is 128520??

- anonymous

that cant be right bc there were only 5100 total votes

- anonymous

wait... 357??

- radar

I got 357

- radar

I like your logic when you got the wrong answer, you knew the answer had to be less than 5100. good thinking

- anonymous

that was correct! yay! now i only have 2 more of those kind to do. will u help me with those also?

- anonymous

thanks:) haha

- radar

Let's roll

- anonymous

The circle graph below summarizes the 150 members of a university fraternity by their majors.
The central angle for the Sociology slice is 79.2 degrees . What percentage of the fraternity members are Sociology majors? Do not round.

- radar

This is very similar to the previous problem. Set up the ratio

- radar

79.2 x
-------- = -------
360 150

- anonymous

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- anonymous

ok..ill try it

- anonymous

33??

- anonymous

33%

- radar

Me too

- anonymous

it said that was incorrect.

- radar

Yes percent, some teachers are fussy about units lol

- anonymous

it said that was incorrect :(

- radar

OH OH

- anonymous

ughhh!

- radar

That was an angle of 79.2 degrees or was it 79 degrees and 2 minutes?

- anonymous

79.2 degrees

- radar

150 members right

- anonymous

yes

- anonymous

it says the answer is 22%

- anonymous

bc 79.2
---- = 0.22
360

- radar

Yes, that is right we calculated the number of the members 33 which is 22% of 150. Sorry I didn't see that sooner.

- anonymous

that's okay

- anonymous

As part of a survey, 1500 people were asked to name their favorite sport to watch. The table below summarizes their answers. This information is also presented as a circle graph.
Find the central angle measure, x degrees , for the Basketball slice in the circle graph. Do not round. i will put the circle graph up now.

- radar

I have read the question closely and I know what we are looking for this time

- anonymous

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- anonymous

sorry i made that on paint haha

- radar

Where is the table?

- anonymous

click on graph

- anonymous

oh h/o i will put the table up

- anonymous

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- anonymous

can u see it?

- radar

Yes. it looks like basket ball is 13%, I want to add them all up to see if I am missing something, they should add up to 100.......they do.

- anonymous

it is looking for x

- radar

Since the central angle is 360 degrees, then 13% would be represented by 13% of 360 degrees. Does that sound logical?

- anonymous

so to find x i would 13/360??

- radar

If that is the case, then 360 * .13 = 46.8 degrees

- radar

No you would look at it like if it was like 50% then it would be 1/2 or 180 degrees. It is a fractional multiplying thing. you are multiplying 13% which is 13/100 or .13 get it?

- anonymous

yes i do thank u. now will u help me with 2 more of these same type of questions? to make sure i can do it?

- radar

I will until I have to leave, my wife wants to deliver some invitational cards for my mother's birthday. So go ahead.

- anonymous

Last week, there were 450 student absences at Jefferson High. The table below summarizes them by the day of the week on which they occured. This information is also presented as a circle graph.
Find the central angle measure, x degrees , for the Thursday slice in the circle graph. Do not round.

- radar

Hey that is pretty much like the last one. Should be a piece of cake Ha

- radar

Again we are looking for degrees.

- anonymous

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- radar

What do you think we should do first?

- anonymous

set up a ratio?

- radar

Yes, the ration needs to show the ratio of thurs absentees to the total absentees

- anonymous

i'm not sure how that would be displayed :/

- radar

That ratio will be equal to the x angle/360 degrees

- radar

Add the total absentees, I get 350 what do you get?

- anonymous

i got 450

- radar

You're right
99 x
----- = -------
450 360

- anonymous

ohh okkkkk =)

- anonymous

79.2?

- radar

I got 79.2 degrees

- anonymous

me tooo!

- radar

Sorry but I got to run.

- anonymous

that's okay thank u so much :)

- radar

Good luck.

- anonymous

thanks!

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