anonymous
  • anonymous
A bicycle wheel with radius 26" rotates through an arc that measures 80°. What is the length of the arc of the tire that touched the ground? a) 2.88pi inches b) 5.78pi inches c) 11.56pi inches
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
I tried to divide 80 by 26 and then multiplying that answer by 180, but it didn't work out so well...
anonymous
  • anonymous
now we have to convert 80 degree to radians
anonymous
  • anonymous
Divide it by pi

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More answers

anonymous
  • anonymous
?
anonymous
  • anonymous
no this time we are converting the other way \[80\times \frac{\pi}{180}\]
anonymous
  • anonymous
1.395?
anonymous
  • anonymous
that comes out to be \[\frac{4\pi}{9}\] radians
anonymous
  • anonymous
oh
anonymous
  • anonymous
0.4pi
anonymous
  • anonymous
yeah about that we are still not done though
anonymous
  • anonymous
Do we multiply that by 180?
anonymous
  • anonymous
no now we think, maybe draw a picture
anonymous
  • anonymous
|dw:1436971051817:dw|
anonymous
  • anonymous
we want \(a\) the arc length the radian measure is arc length over the radius so \[\frac{a}{26}=.4\pi=1.4\] so \[a=26\times 1.4\]
anonymous
  • anonymous
http://www.wolframalpha.com/input/?i=26*1.4 you got a choice that is close to 36.4?
anonymous
  • anonymous
oh wait, i see all your answers have \(\pi\) in them
anonymous
  • anonymous
\[a=26\times \frac{9}{4}\pi=11.5\pi\]
anonymous
  • anonymous
Wow that makes alot more sense than it did before
anonymous
  • anonymous
yeah sorry i messed up earlier
anonymous
  • anonymous
Umm. There's another question. I have already answered it, but I want to make sure I'm doing this the right way
anonymous
  • anonymous
kk
anonymous
  • anonymous
If the length of an arc is 12pi inches and the radius of the circle is 10 inches, what is the measure of the arc? a) 216 degrees b) 270 degrees c) 288 degrees
anonymous
  • anonymous
I chose A
anonymous
  • anonymous
Is that correct?
anonymous
  • anonymous
let me check
anonymous
  • anonymous
the radian measure is \[\frac{12\pi}{10}=1.2\pi\]
anonymous
  • anonymous
then \[1.2\pi\times \frac{180}{\pi}=1.2\times 180=216\]
anonymous
  • anonymous
yeah you got it !
anonymous
  • anonymous
Thanks
anonymous
  • anonymous
yw now i am listening to your your tube
anonymous
  • anonymous
I feel pretty good now. Finally! Lol!
anonymous
  • anonymous
Take your time.
anonymous
  • anonymous
what should i be looking for ?>
anonymous
  • anonymous
Me dropping my music and then picking it up on the left side of the screen somewhere in the middle of the song
anonymous
  • anonymous
Lol!
anonymous
  • anonymous
I should be the last person on the row of trumpets. On the outside since I'm leader
anonymous
  • anonymous
i will look again right or left side?
anonymous
  • anonymous
Left
anonymous
  • anonymous
You should see white paper
anonymous
  • anonymous
on the floor and me picking it up
anonymous
  • anonymous
ok looking now
anonymous
  • anonymous
You see it. I mean me Lol!
anonymous
  • anonymous
lol yeah
anonymous
  • anonymous
you are hidden mostly but i did see you pick up the sheet!
anonymous
  • anonymous
Yeah It's a little embarrassing
anonymous
  • anonymous
you got more math questions are are you ok? i gotta run soon
anonymous
  • anonymous
Oh sorry
anonymous
  • anonymous
I had to grab something to eat
anonymous
  • anonymous
eating is good you got any more before i run?
anonymous
  • anonymous
Yeah

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