exam
Maths Puzzle
Numerical Ability
PLEASE HELP!!
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p^-3/4m^2 (2p^2/m^-2 - 8m^-2/a^2b^3p)
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exam Other Question
a tank holds 80 liters of a chemical solution. currently, the solution has a strenght of 30%. how much of this solution must be drained and replaced with a 70% solution to get a strenght of 40%?
Factor completely.
z squared + 2z - 8