Problem 1
Part 1.a: Area at X = 0 is 14.1372
Part 1.b: Volume of entire hemisphere is 56.5487
          Using integrals, volume is 56.5487
Part 1.c: When X = 0 the volume is 28.2743
Problem 2
Part 2.a:
   The area at t = 1 is 0
   The area at t = 2 is 25.1327
   The area at t = 3 is 0
Part 2.b:
   The volume at t = 2 is 15.5504
   The volume at t = 3 is 39.4784
Part 2.c:
Warning: Minimum step size reached; singularity possible.
(Type "warning off MATLAB:quad:MinStepSize" to suppress this warning.)
> In C:\Program Files\MATLAB6p5\toolbox\matlab\funfun\quad.m at line 85
  In U:\private\temp310\convergeTL\volumeTorus.m at line 7
  In U:\private\temp310\convergeTL\convergeTL.m at line 55
   The volume at t = 1 is 0
   The volume at t = 2 is 15.5504
   The volume at t = 3 is 39.4784
Part 2.d: The value of t where volume = 20 is 2.1706
Problem 3
The value of t where volume = 20 is 0.40965