Higher Plus

y is inversely proportional to x². When x = 5, y = 32. Work out y when x = 4.y is inversely proportional to x^2. When x = 5, y = 32. Work out y when x = 4.

A triangle has sides of 12 cm and 13 cm and an area of 78.00 cm². Work out the acute angle between those two sides, to the nearest degree.A triangle has sides of 12 cm and 13 cm and an area of 78.00 cm^2. Work out the acute angle between those two sides, to the nearest degree.

A bag holds 6 counters, r of them red. Two are taken without replacement and P(both red) = 1/5. Work out r.

A histogram has four 20-wide classes from 0, with frequency densities 0.5, 3, 2, 1. Which class contains the median?

A block has mass 680 g (to the nearest 10 g) and volume 11 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 680 g (to the nearest 10 g) and volume 11 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.