Daily Practice - Higher Plus

A histogram has two bars: one 20 units wide with frequency density 1.2, one 5 units wide with density 0.6. How many values in total?

A block has mass 400 g (to the nearest 10 g) and volume 21 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 400 g (to the nearest 10 g) and volume 21 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

In an algebraic proof, how would you write three consecutive even numbers in terms of an integer n?

y is directly proportional to x². When x = 6, y = 288. Work out the positive value of x when y = 288.y is directly proportional to x^2. When x = 6, y = 288. Work out the positive value of x when y = 288.

In a circle theorem proof, a step uses the fact that a radius is drawn to the midpoint of a chord. State the reason being quoted.