C. 2+3 = 5
1/12+1/12=2/12
So C would make sense because those all add up to the answer :-)
3 is in the tens and 1 is in the ones. To explain more easily... 30+1 is 31.<span />
Well, 50 x 4 = 200, so just keep adding 0's!
50 x 4= 200
50 x 40 = 2,000
50 x 400 = 20,000
500 x 400 = 200,000
<em>Hope helps!-Aparri</em>
A = pi r^2
531 = 3.14 ( r^2)
169.12 = r ^2
Take the square root
13 = r
Diameter = 2r
D = 2(13)
D = 26 mm
