In one quarter Stuart uses 2512 units of electricity. Part of his electricity bill is shown below. Units used = 2512 Cost of first x units at 12.86p per unit = £ Cost of remaining units at 11.8p per unit = £ Total cost of electricity used = £298 work out the number of units, at 12.86p per unit, that Stuart used. Give your answer to the nearest unit.

Cor d? ? me ? max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.