Daily Practice - Higher Plus

y is directly proportional to √x. When x = 49, y = 42. Work out y when x = 36.y is directly proportional to sqrt(x). When x = 49, y = 42. Work out y when x = 36.

A triangle has sides of 13 cm and 8 cm and an area of 26.00 cm². Work out the acute angle between those two sides, to the nearest degree.A triangle has sides of 13 cm and 8 cm and an area of 26.00 cm^2. Work out the acute angle between those two sides, to the nearest degree.

A bag holds 8 counters, r of them red. Two are taken without replacement and P(both red) = 3/28. Work out r.

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

A block has mass 780 g (to the nearest 10 g) and volume 4 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 780 g (to the nearest 10 g) and volume 4 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.