Answer:
Newsletter
Explanation:
Newsletters are updates to things happening at the company that current or existing clients may need to know
Answer:
potassium oxalate and sodium fluoride
Answer: They are learning a new vocabulary. C
Explanation:
It was commercially introduced in 1839, a date generally accepted as the birth year of practical photography. The metal-based daguerreotype process soon had some competition from the paper-based calotype negative and salt print processes invented by William Henry Fox Talbot
