Yes it is the only empire that existed in the history of Africa
The first blank would be strengthening and the second blank is weakening. Negative reinforcement can increase the child's behavior because your negative reinforcement conditions him that it is ok to do such thing. While positive punishment is disregarded when the person practices negative reinforcement,
Romans made concrete by mixing lime and volcanic rock to form a mortar. To build underwater structures, this mortar and volcanic tuff were packed into wooden forms.In addition to being more durable than Portland cement
Explanation:
The answer to this is Martin Luther King JR
<span>The story of North American exploration spans an entire millennium and involves a wide array of European powers and uniquely American characters. It began with the Vikings’ brief stint in Newfoundland circa 1000 A.D. and continued through England’s colonization of the Atlantic coast in the 17th century, which laid the foundation for the United States of America. The centuries following the European arrivals would see the culmination of this effort, as Americans pushed westward across the continent, enticed by the lure of riches, open land and a desire to fufill the nation’s manifest destiny.</span>
