What is the maximum power level of a radio station so as to avoid electrical breakdown of air at a distance of 0.70 mm from the transmitting antenna? Assume the antenna is a point source. Air breaks down in an electric field of about 3×106V/m3×106V/m .

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.