Higher Plus

A histogram has two bars: one 5 units wide with frequency density 1.2, one 10 units wide with density 0.6. How many values in total?

A block has mass 380 g (to the nearest 10 g) and volume 13 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 380 g (to the nearest 10 g) and volume 13 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

Solve x² - 1 < 0.Solve x^2 - 1 < 0.

y is directly proportional to x². When x = 4, y = 128. Work out the positive value of x when y = 128.y is directly proportional to x^2. When x = 4, y = 128. Work out the positive value of x when y = 128.

A cuboid measures 4 cm by 4 cm by 3 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.