Can someone tell me what i have to divide to get the answer

#12 find the value of x. #13 find the value of the variable.

Small kingdoms on the iberian peninsula fought to take land back from the moors during which event? the hundred years’ war the wars of the roses the reconquista the great schism

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?