Businessman Elon Musk said people work up to 100 a week to "change the ". Mr Musk started SpaceX, Tesla, and PayPal. His have changed our . He is a . He loves . He said: "There are places to work, but ever changed the world on 40 a week."
Mr Musk said "" at Tesla has worked 100 hours per at this . Some workers are with their hours. Others like to work 70 hours per week. Musk said the " level" increases above 80 hours a week. The of a -dollar company works about hours a week.