ZiNgA BuRgA Wrote:Eh, this actually looks easier than I thought (if I remember my maths right, lol).

p(r) = (3200.0 kg/m³)(1 - 0.1r/(14.13×106 m))
  = 2.136495346446074 kg/m⁴ × (1 - 0.1r m)
  = 2.136495346446074 kg/m³ - 0.2136495346446074r kg/m³

Mass:
m(r) = p(r) × ⁴/₃ × pi × r³
  = (2.136495346446074 × ⁴/₃ × pi × r³) - (0.2136495346446074 × ⁴/₃ × pi × r⁴)
  = 8.94933076953892r³ - 0.894933076953892r⁴

Integrate m(r):
m'(r) = 8.94933076953892r⁴ ÷4 - 0.894933076953892r⁵ ÷5
  = 2.23733269238473 r⁴ - 0.1789866153907784 r⁵
m'(0) = 0
m'(1497.78) = 2.23733269238473 × 5032596467778.001 - 0.1789866153907784 × 7537722337508535 = 11259592604939.64 - 1349151408946119 = -1337891816341179

Mass = m'(0) - m'(1497.78) = 1337891816341179 kg

Hope I got it right >_>

You didn't remember all those formulas right? Otherwise you're way superior to me... I pretty much cannot remember anything from back then...