Web Analytics

Can someone explain to me how to do these, I dont get it.


A hair stylist worked from 8:45 A.M. until 12:15 P.M. and 12:45 P.M. until 5:15 P.M. Estimate the total number of hours worked.



8 hr


7 hr 15 min


8 hr 15 min


7 hr 30 min