Envelope - a flat paper container with a sealable flap, used to hold a small letter or document.
letterhead - a printed heading on stationery stating a person's or organization's name and address. A letterhead is very important when it comes to businesses.
Hope this helps! =D
The only way to write 42 as the product
of primes.
Except to change the order of the factors is
2 × 3 × 7. We call 2 × 3 × 7 the prime factorization of 42.
Answer:
1980s
Explanation:
Source:
https://www.cbc.ca/news/technology/5-major-moments-in-cellphone-history-1.1407352
I believe the answer could be the first choice. I'm not quite sure, though