Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet
This in mind, learning ‘on the job’ is the best approach to developing a new skill. Whether learning to play an instrument, become a nurse, or to speak another language, learning whilst doing<span> is better than theory alone</span>
Answer:
First aid kits may not contain prescription or over-the-counter medications such as aspirin, ibuprofen, decongestants, sinus relief, etc. These are not first aid items.
Explanation:
Hope this helps.
Answer: Ambulatory monitoring of the electrocardiogram in 100 healthy 14 to 16 year old boys showed heart rates ranging from 45 to 200 beats/minute during the day and from 23 to 95 beats/minute during sleep.
