book Maths Puzzle Numerical Ability

You tell Congress that the space ship they ask for would have a raius that's ?? times bigger than what you suggested and the voume (and weight and cost) would be ?? as large. After

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book Other Question

The first side of a triangle is 8m shorter than the second side. The third side is 4times as long as the first side. The perimeter is 26m. Find the length of each side. solve equation using "t" substitution method:

12r^4-11r^2+2=0 (12r^4 just means 12r to the fourth, same with 11r^2)