Name the type of crystalline solid formed from the following structural units and describe how the solid is formed.

Given: m∠apc = 27°, m dc = 27° find: m ab

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?

Aside form a students id, what is another card a collage student use to obtain discounts