What is the circumference of the circle if the radius is:
1. 6
a 31.544
b 28.577
c 37.699
d 54.465
e 34.249
f 18.765
2. 2
a 13.781
b 12.566
c 19.753
d 61.889
e 37.551
f 23.184
3. 5x
a 6 (x)pi
b 32 (x)pi
c 15(x)pi
d 5 (x)pi
e 10(x)pi
f 57(x)pi
4. 3x-4
a (9x-15)pi
b (2x-4)pi
c (7x-9)pi
d (6x-8)pi
e (12x-13)pi
f (1x-8)pi
5. 5x/3
a (10x/3)pi
b (7x/5)pi
c (6x/3)pi
d (8x/6)pi
e (15x/12)pi
f (9x/7)pi
what is the radius if the circumference is:
6. 30x(pi)
a 11x
b 21x
c 78x
d 18x
e 2x
f 15x
7. 4x-10pi
a (3x/pi) - 4
b (2x/pi) - 5
c (7x/pi) - 9
d (6x/pi) - 11
e (5x/pi) - 10
f (4x/pi) - 7
8. (5/2)pi
a (5/4)
b (8/3)
c (6/1)
d (9/4)
e (6/7)
f (10/7)
9. 14pi
a 7
b 13
c 20
d 5
e 8
f 10
10. (x + y)pi
a (x+y)/7
b (x+y)/5
c (x+y)/1
d (x+y)/2
e (x+y)/3
f (x+y)/8
what is the length of the arc if:
11. r=10 n=20
a 15(pi)/ 7
b 13(pi)/ 5
c 16(pi)/ 2
d 11(pi)/ 4
e 10(pi)/ 9
f 9(pi)/ 4
12. r=3 n=6
a pi/9
b pi/12
c pi/26
d pi/10
e pi/8
f pi/4
13. r=4 n=7
a 8(pi)/55
b 6(pi)/12
c 7(pi)/45
d 2(pi)/22
e 9(pi)/18
f 7(pi)/37
14. r=2 n=x
a x(pi)/15
b x(pi)/30
c x(pi)/60
d x(pi)/90
e x(pi)/120
f x(pi)/150
15. r=y n=x
a x*y*pi/90
b x*y*pi/30
c x*y*pi/45
d x*y*pi/27
e x*y*pi/180
f x*y*pi/115
what is the radius if:
16. n=30 l=1/3xy(pi)
a 6xy
b 8xy
c 2xy
d 10xy
e 3xy
f 14xy
17. n=40 l=8/9(t)(pi)
a 20t
b 5t
c 9t
d18t
e 12t
f 4t
18. n=15 l=(21/36)pi
a 7
b 21
c 28
d 62
e 56
f 14
19. n=5 l=1/2pi
a 24
b 30
c 45
d18
e 66
f 39
20. n=18 l=6(y)pi
a 30y
b 45y
c 120y
d 90y
e 15y
f 60y