Daily Practice - Higher Plus

The probability of winning a game is 4/5. A player expects 52 wins. How many games did they play?

On a histogram the bar for 40 < x ≤ 60 has a frequency density of 1.2. How many values are in that class?On a histogram the bar for 40 < x <= 60 has a frequency density of 1.2. How many values are in that class?

A block has mass 400 g (to the nearest 10 g) and volume 6 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 6 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

Solve x² + 7x + 10 < 0.Solve x^2 + 7x + 10 < 0.

y is directly proportional to x³. When x = 4, y = 320. Work out y when x = 2.y is directly proportional to x^3. When x = 4, y = 320. Work out y when x = 2.