There is an almost isotropic radiation coming to earth from outer space from all direction, the so-called background radiation. this radiation corresponds to a temperature of 3 k. to which wavelength should we tune our antenna in order to detect this radiation? a. 966 mmb. 8.69 mmc. 8.69 μmd. 966 μm

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.