What conditions are need for an accurate radiometric date to be obtained form a mineral sample?

Which pronoun has an unclear antecedent in the following sentences? the sixth-grade students liked volunteering their time to read to the elderly people in the hospital. it made them happy. a. their b. it c. them d. no unclear antecedents

The arrival of the conquistadors affected every indigenous people group they encountered. in this activity, you will write letters from the point of view of an incan and a conquistador. research the topic on the internet or at the library before writing. each letter should contain at least two paragraphs and be at least eight sentences long. 1) you are an inca and the conquistadors have arrived in your village! write a letter to be sent to other incan villages. describe your thoughts about the conquistadors and how their arrival might change your life. 2) write a letter from the point of view of a conquistador meeting the incas for the first time. address the letter to your family back in spain.me! i would really appreciate it! my dog died this morning and we are trying to fill out a form for her. it would amazing if you could me on this.

How did the growth of railroads american businesses expand