exam
Maths Puzzle
Numerical Ability
(3+square root of 5)squared
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exam Other Question
Angela needs 20 quarts of 50% antifreeze solution in her radiator. She plans to obtain this by mixing some pure antifreeze with an appropriate amount of 40% antifreeze solution. How many quarts of each should she use?
Find f(1) for f(x)=x^3+x^2-1