Boyfriend and girlfriend friend

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?

Match each fossil with the layer where it’ll be present based on those conditions.

Carbon dioxide can be produced form what type of power generation?