Question

PLEASE HELP ME ANSWER THESE QUESTIONS FOR THIS IMAGE.
-PICTURE IS UNDER THIS POST-

Answer 1

This exact question came up earlier today.

Answer 2

REALLY? SOMEONE ELSE ASKED IT?

Answer 3

Yes, this exact same question. Down to the letter.

Answer 4

THATS WEIRD LOL

Answer 5

yep some christine person

Answer 6

invited us to twiddla to have us do it... probably same workbooks.

Answer 7

oh ok.. could you guys help me do this?

Answer 8

Formula for area and circumference were given in the previous answer.

The question of arclength is this:

100% of the circumference is pi times diameter. (that's a full 360 degrees).

Now, you're only given 72%, so what percent of the full 360 degrees is that?)

Answer 9

do I multiply 72 and 360??

Answer 10

the entire circle q area is\[225\pi\]
and the diameter of the circle is \[30\pi\]
the last question in the picture wants you to find the arclength of the circle, which is 72/360 degrees of the circle. You will find it to be \[5\pi\]

Answer 11

oops. it's \[6\pi\]

Answer 12

you don't multiply them. you multiply \[\frac{72}{360}\] by the circumference of the circle which is \[30\pi\]

Answer 13

what about the area?

Answer 14

225?

Answer 15

and the area is 15?

Answer 16

to find the area, you need to use the equation \[Area = \pi r^2\]
where r is given to be 15 inches

Answer 17

i mean the length of DE

Answer 18

the length of DE is not actually 15 inches. It's the length of DQ and QE

Answer 19

so when it says calculate the are of the circle Q the answer is 15 pi?
the circumference=30
the length of DE=15?

Answer 20

oh ok

Answer 21

so what would the length of DE be?

Answer 22

once you find the circumference of circle Q (30pi) you multiply it by \[\frac{72}{360}\]

Answer 23

to get the arclength of DE. for the length of the segment DE... you need to work with triangles.

Answer 24

the length of DE=6?

Answer 25

how did you find that?

Answer 26

72/360x30?

Answer 27

yeah. that's the answer to the last question in the picture, the length of arc DE :-D

Answer 28

thanx! so everything else is right? number 4 is a)15 and number 5 is b)30?

Answer 29

number 5 is right.

number 4 is wrong though. check my answer again

Answer 30

15 squred so its 225?

Answer 31

I got 225 pi using the formula for area of a circle

first I squared 15 to get 225, then I multiplied it by pi.

Answer 32

choice d.

Answer 33

ok,thanx ALOT..there are 2 more question to this image im going to be posting in like 5 seconds..if you could help me out that would be awesome

Answer 34

\begin{array}l\color{#FF0000}{\text{Y}}\color{#FF7F00}{\text{o}}\color{#FFFF00}{\text{u}}\color{#00FF00}{\text{ }}\color{#00FF00}{\text{p}}\color{#0000FF}{\text{o}}\color{#6600FF}{\text{s}}\color{#8B00FF}{\text{t}}\color{#FF0000}{\text{,}}\color{#FF7F00}{\text{ }}\color{#FF7F00}{\text{I}}\color{#FFFF00}{\text{ }}\color{#FFFF00}{\text{a}}\color{#00FF00}{\text{n}}\color{#0000FF}{\text{s}}\color{#6600FF}{\text{w}}\color{#8B00FF}{\text{e}}\color{#FF0000}{\text{r}}\end{array}