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Maths Puzzle
Numerical Ability
Simplify the following. (-3w^2n)(2n^2)^4
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book Other Question
Solve the following inequalities:
a) x^3 < 8
b) x^3-x^2-9x+9 > 0
c) 2x^2-3x+1 / x+1 >0
how many liters each of two solutions containing 30% and 20% acid, respectively, must be mixed to prepare 50 liters of solutions containing 26% acid?