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@

Can you find area of semicircle?

yes that 4.71cm2

No.

but you said semi circle so wouldn't it be A=1/2pi r

So area of semicircle is \(\dfrac{\pi r^2}{2}\)

Radius is 3, so you have \(\dfrac{\pi(3)^2}{2} = \dfrac{9\pi}{2}\approx 14.137\)

Just remember that \(\pi\approx3.14\)

yes you told me that, thats how remember what pi is but how did you get the 9pi over 2

\(3^2 = 9\)

you divide 2 because semicircle

Is that clear?

yes kinda

Well, we are not done

we got area of semicircle. Now we need to subtract that by area of triangle

(Area of semicircle) - (Area of triangle)
Right?

yea

Ok. Area of triangle is \(\dfrac{1}{2}bh\)
Do you know base and height here?

but we don't have the area of the triangle so we need to solve for the triangle

Right.

so 3 would be our height

so how would you find the base given only the height

We don't really have to use height to find base.
Triangle and semicircle share same base, right?

yes

do the MAGIC! drawing thing geerky

We know that radius of semicircle is 3, so what is diameter?

:D

hahaaaa @camacho01erick that was the best response

lol. though I don't see the need to drawing something here lol.

1.5

maybe I will do magic thing once asker solve something like gif of victory lol.

@Mromanos96 No
\(d = 2r\), right?

yes

|dw:1433962650107:dw|

:0

Yeah so diameter is 6.
Therefore base of triangle is 6.
MAke sense so far?

yes so next we have 1/2 6*3

|dw:1433962764011:dw|

Sorry yesh that's correct.

lol funny ones

just laughing at ":0"

that kinda scares me

@camacho01erick it kinda does if you look at it for a little

ikr

|dw:1433962900186:dw|

how do you do that :D

:0 my favorite show man

@camacho01erick he's a wizard

fa fa fabulas

Anyway, no I got 9 for area of triangle

\(\dfrac{1}{2}*3*6 = 3*3 = 9\)

Right? @Mromanos96

ah how did you get that the only other one i got is a decimal

For area of triangle?

Did you use calculator?

I guess I need to make tutorial @camacho01erick in LaTeX section. I will tag you someday, I promise.

kk

yea

Well, put that in calculator 1/2 * 3 * 6

You should get 9, right?

yup

|dw:1433963336155:dw|

so 9cm^2

OK.
Now do final thing;
(Area of semicircle) - (Area of triangle)

We have \(14.137 - 9\)

we are /\tlas we will follow and we will not forget and will not forgive

5.137

Is that clear so far?

yes crystal

ok good.

@geerky42 one last question

https://www.mathsisfun.com/data/relative-frequency.html

And here, voting registration status is irrelevant.

So we just need to find how many adult prefer newspapers
Then divide it by 252 (total)

Follow me so far?

yes

OK. how nay adults prefer newspaper?

how many*

46+24=70

hi

70 /252= 0.2

Correct.
So relative frequency is \(\dfrac{70}{252}=?\)

yeah but close. question said at least two decimal places.

So we have 70/252 = 2.777777777...
So round that to .28

0.27

That's your answer.

so it .28 not 0.28

|dw:1433964202516:dw|

Well it is closer to .28 than .27

0.28 and .28 are same

true

so really .28 or 0.28 because ales is very specific on it

I would go with 0.28

ok @geerky42 last one promise

|dw:1433964384649:dw|

sorry no need to use graph

5.61

\[y = -0.73(\bf\color{blue}4)+8.53\]

yeah 5.61 is your answer.

No problem

and um how do you do those gifs lol

|dw:1433964611059:dw|

I will make tutorial of it by tonight. Check tomorrow.

but how on drawing????

I will make tutorial later, I promise. Check tomorrow.

It's little complicated.

ok message us tommorow

I will tag. You want message anyway?

sure

What about you? Or nah? @Mromanos96

yeah tag me also

ok I will tag both you

geerky is a new moderator lol

I wish lol.

but how can you be a moderator anyways

a beginner have done it

You got to apply somewhere... I don't know because I was planning on doing that anyway lol.

|dw:1433964783733:dw|

You can ask that on OpenStudy feedback.

lol he'd be the number one

I wasn't planning*

i copyed yours lol

I can see that ;)

lol

we are /\tlas we will follow we will not forget and we will not forgive

bye