Please show steps and explain

Arandom variable x has a mean of 10 and a standard deviation of 3. if each value of x is multiplied by 2, what will the new mean and standard deviation be?

In some native american tribes there is a disorder called which is when individual experience violent or aggressive outbursts of which they have no memory. a.) amok b.) zar c.) taijin-knofu-sho d.) anorexia nervosa

What should a person do to prepare for a wildfire? a. know two exit routes for each room in the house b. store extra food in bulk c. have a basement or internal room in the house for shelter d. use sandbags to reinforce doorways and windows