Ada draws the graph of y = x² - x - 2 and y = 2x - 1 on the same axes. Which of these equations is she solving?

The volume of a cone of height 3cm is 38\(\frac{1}{2}\)cm³. Find the radius of its base. [Take \(\pi = \frac{22}{7}\)]

The dimension of a rectangular tank are 2m by 7m by 11m. If its volume is equal to that of a cylindrical tank of height 4cm, calculate the base radius of the cylindrical tank. [Take \(\pi = \frac{22}{7}\)]