Higher Plus

A histogram has two bars: one 10 units wide with frequency density 1.2, one 5 units wide with density 1.4. How many values in total?

A block has mass 440 g (to the nearest 10 g) and volume 17 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 440 g (to the nearest 10 g) and volume 17 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

In an algebraic proof, how would you write a number that leaves a remainder of 1 when divided by 8 in terms of an integer n?

y is directly proportional to x². When x = 3, y = 72. Work out the positive value of x when y = 72.y is directly proportional to x^2. When x = 3, y = 72. Work out the positive value of x when y = 72.

In a vector proof you find that vector PQ = 5a + 4b and vector RS = 25a + 20b. What does this show about PQ and RS?