Mr Ndlovu works in centurion and works at Rosebank. It takes him 13minutes to get to work and he needs to be there at 08h15 at what time must he leaves at his home to get to work?​

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?