Rationalize the denominator of the given expression \(\frac{\sqrt{1 + a} - \sqrt{a}}{\sqrt{1 + a} + \sqrt{a}}\)
When a dealer sells a bicycle for N81 he makes a profit of 8%. What did he pay for the bicycle?
The median of the set of numbers 4, 9, 4, 13, 7, 14, 10, 17 is
List all integer values of x satisfying the inequality -1 < 2x - 5 \(\leq\) 5
