Foundation Plus

Grouped data has five classes of width 10, the first being 20 < x ≤ 30. The frequencies in order are 16, 11, 7, 3, 21. Write down the modal class.Grouped data has five classes of width 10, the first being 20 < x <= 30. The frequencies in order are 16, 11, 7, 3, 21. Write down the modal class.

Write 3⁸ / 3³ as a single power of 3.Write 3^8 / 3^3 as a single power of 3.

The lines y = 3x - 19 and y = 4x - 25 are drawn. Write down the coordinates of the point where they cross.

Red and blue marbles are in the ratio 2 : 9. There are 8 red marbles. How many marbles are there altogether?

A cone has base radius 5 cm and vertical height 9 cm. Work out its volume, leaving your answer in terms of π.A cone has base radius 5 cm and vertical height 9 cm. Work out its volume, leaving your answer in terms of pi.