Kind of the whole point of an infinite geometric series is that you can't find the sum. If it is infinite, then the sum is infinite.
$112
1-1/5=4/5
4/5 x 140 =112
hope this helps :)
It would be: 4 2/7 * 2 1/5
= 30/7 * 11/5
= 330/35
= 66/7
In short, Your Answer would be 66/7 or 9 3/7
Hope this helps!
314.16 yards^2 for the Area
B. 11.33 is closer to the area of a circle with a radius of 2.1