The x intercept is the amount of money she has and I don't know what it is.... sorry. I knew what it stood for though.
The answer would be -2 or 0
10000:100*11=1100 income per year
21000-10000=11000 need to have income
11000:1100=10 years will pass time
The volume of the pyramid is 448m^3
(16)(12)(7)/3
= 1334/3
= 448
