If \(\frac{3^{(1-n)}}{9^{-2n}}\) = \(\frac{1}{9}\) find n

Which of the following is/are not the interior angle(s) of a regular polygon? I.108° II. 116° III. 120°

In a ∆ XYZ, /YZ/ = 6cm YXZ = 60o and XYZ is a right angle. Calculate /XZ/in cm, leaving your answer in surd form

If \(P = \sqrt{QR\left(1+\frac{3t}{R}\right)}\), make R the subject of the formula.

From the Venn diagram below, how many elements are in P∩Q?