You can set up an equation to represent what you make versus sales and pay.
2x + 50 = 100
where x equals the number of sales. Simplifying the equation reveals that x = 25, so the minimum number of sales required to make 100 dollars is 25 sales.
The volume of a sphere, V = (4/3)(PI)(R^3)
Let k = (4/3)(PI)
Therefore, V = k (R^3)
Let R’ = new radius = 2R
V’ =k (R’^3)
= k (2R)^3
= 8 k R^3
= 8 V
The volume would be eight time the original volume.