What has highest frequency in electromagnetic spectrum color?

What is the temperature in degrees celsius of a substance with a tempature of 49k

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.

Which describes increasing the efficiency of energy resource