Simplify \(\frac{9^{-\frac{1}{2}}}{27^{\frac{2}{3}}}\)

In the diagram above, what is the size of angle ACB?

With reference to the graph above, which of the following solution sets is represented by ΔOPQ?

Find the volume of a cone of radius 3.5cm and vertical height 12cm [Take π = 22/7]

The table above gives the scores of a group of students in an English Language test