exam Maths Puzzle Numerical Ability

Solve the equations. Check for extraneous solutions.

2(x+2)^1/3=6

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exam Other Question

A sample of seawater contains 6.0277g sodium chloride per liter of solution.
How many mg of salt would be found in 15.0 ml of seawater? Solve and put your answer in interval notation: abs(1/7y+2)-5 >3