S Rey

A conference centre charges £120 to hire a room, with an additional charge of £8 for each delegate. (a) Find the total cost (including room hire) of a conference with 30 delegates. (b) Write down a formula for the total cost, C,in £,ofhiring a room for a...

The distanceãd in kilometres to the horizon can be estimated using the formula d = 13h,where h is the height above ground level, in metres, of the observer. (a) Use the formula to find the distance to the horizon for an observer on the London Eye, 135m a...

Choose the two true statements from the following. Options A) If the rate of inflation as measured by the RPI is 2%, then a pension index linked to the RPI will increase by 2%. B) A price ratio of 0.8 corresponds to a price decrease of 80%. C) If the pric...

A walk up a hill starts at a car park on the 100m contour and climbs steadily to a summit at 240 m. On a map with scale 1:25 000 the distance along the path from the car park to the summit is 9.6 cm. Choose the three true statements from the following. Op...

Choose the three true statements about the graph of the quadratic function y = x2 − 3x − 4. Options A) The graph is a parabola with a minimum point. B) The graph is a parabola with a maximum point. C) The point (2, 2) lies on the graph. D) The point (1, 6...