tara wants to attend a four-year college to become a math teacher. which statements explain the possible differences in total yearly cost for attending a public college in state and public college out of state? check all that apply.

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?