Daily Practice - Higher Plus

The probability of winning a game is 3/8. A player expects 30 wins. How many games did they play?

On a histogram the bar for 40 < x ≤ 45 has a frequency density of 0.4. How many values are in that class?On a histogram the bar for 40 < x <= 45 has a frequency density of 0.4. How many values are in that class?

A block has mass 390 g (to the nearest 10 g) and volume 19 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 390 g (to the nearest 10 g) and volume 19 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

f(x) = 8x - 9. Work out the inverse function f^-1(x).f(x) = 8x - 9. Work out the inverse function f^-1(x).

A train slows steadily from 19 m/s to rest in 8 seconds. Work out its deceleration.