1. anonymous

2. anonymous

@hick4life

3. hick4life

ok lets see here

4. dumbcow

arc length = radius * angle angle must be in radians convert 315 to radians by multiplying by pi/180

5. hick4life

My best option is going to be is the 3 because you have to simplify and so i did that so your answer is the 3rd one so would pick it

6. anonymous

IT wasn't 3.5pi. what are the steps you used? And @dumbcow I didn't fully understand your explanation

7. dumbcow

ok the length of the arc can be found by multiplying the radius by the measure of the angle. the angle is given in degrees, however it MUST be in radians to get the right answer to convert degrees to radians, you use the fact that 180 degrees equal pi radians $\frac{radians}{degrees} = \frac{\pi}{180} \rightarrow radians = (\frac{\pi}{180})*degrees$

8. anonymous

So 3.14 divided by 180 * 315??

9. dumbcow

yes, however dont use 3.14 for pi notice all the answers have pi in them

10. anonymous

Okay, so 180*315=56700 from there what would I do?

11. anonymous

And is it always 180?

12. hick4life

Yes thats the answer 180 since you divided it by the 3.14 correct

13. dumbcow

@hick4life , stop trolling ... you are not helping

14. dumbcow

@WhatEven , yes its always 180 .... however you multiplied not divided 180 is in the denominator ----> (315/180)*pi

15. hick4life

@Dumbcow just no dude no dont go there

16. anonymous

Meh, Okay. Well once I have 56700 what do I do? @LunyMoony could you shed some light on the situation?

17. dumbcow

@WhatEven , yes its always 180 .... however you multiplied not divided 180 is in the denominator ----> (315/180)*pi

18. anonymous

Okay but when I multiply 180 by 315 I get 56700...

19. dumbcow

@WhatEven , yes its always 180 .... however you multiplied not DIVIDED 180 is in the DENOMINATOR ----> (315/180)*pi $\frac{315}{180} \pi$

20. anonymous

Ohhhhh. Sorry I read it wrong :c

21. anonymous

And I get 1.75 with that...

22. dumbcow

multiply by radius $arc = radius* \text{\angle}$ $arc = 4* \frac{315}{180} \pi$

23. anonymous

Okay, I think I understand now. Thanks (:

24. dumbcow

yw :)

25. anonymous

Would you double check my other answers so I know I'm right @dumbcow?

26. dumbcow

sure

27. anonymous

So I got 1.5 with the equation for this one and it's not an option....

28. dumbcow

you are right .... just change it into a fraction

29. anonymous

So 3/2 pi???

30. dumbcow

yep

31. anonymous

Okay, so they changed up the question a bit. I'm going to close this one and post a new one. Would you still be willing to help? (:

32. dumbcow

sure, it will still be same steps remember ---> radius*(angle/180)pi