Higher Plus

A histogram has two bars: one 10 units wide with frequency density 2.5, one 10 units wide with density 0.8. How many values in total?

Rationalise the denominator of 27/3, giving your answer in its simplest form.Rationalise the denominator of 27/sqrt(3), giving your answer in its simplest form.

The curve y = sin x° is drawn for 0 ≤ x ≤ 360. Write down the value of y when x = 270.The curve y = sin x° is drawn for 0 <= x <= 360. Write down the value of y when x = 270.

On a velocity-time graph a car speeds up in a straight line from 7 m/s to 19 m/s over 8 seconds. Work out the acceleration.

The point (10, 24) lies on the circle x² + y² = 676. Work out the gradient of the tangent to the circle at that point.The point (10, 24) lies on the circle x^2 + y^2 = 676. Work out the gradient of the tangent to the circle at that point.