When traveling through a smoke-filled area, a person must be able to have distance of at least 4 feet in order to safely reach a fire exit. That is option C.
<h3>What is a smoke-filled area?</h3>
Smoke-filled area is an enclosed area that is filled with smoke gas that is usually made up of carbon monoxide.
The smoke-filled area is usually caused by
- Burning of plastics or chemical products
When there is smoke-filled area die to fire out break, there are some guidelines to follow to safely reach the fire exit early enough.
The importance of these guidelines include the following:
- enable rescuers to navigate a scene more quickly,
- identify risks and hazards,
- determine the safest way in and out of a building, and
- map out evacuation routes.
The affected individual should get down and crawl while taking short breath through the nose because cleaner air is nearest to the floor.
Learn more about distance here:
brainly.com/question/7243416
#SPJ1
Answer: 
Explanation:
According to Bronsted and Lowry an acid is a proton donor and base is a proton acceptor.
Therefore, the equation for the reaction will be as follows.
Here, 
acts as a base as it is accepting a proton and 
acts as an acid because it is donating a proton.
Projectile is like a cannon shooting a ball so it will be in "free fall"
While in free fall you are subject to gravity pulling the ball down.
Also since it's flying through the air there is air resistance.
So GRAVITY AND AIR RESISTANCE
hope it helped
D=m/V=0.72/0.1x0.08x0.02=4500(kg/m3)
