Which are precautions to take when working with heat and fire? check all that apply. do not touch. keep flammables away. avoid touching face and eyes. keep clothing away from flame. do not mix chemicals unless told to do so. tie back hair.

All options should be applied.

Explanation:

All options should be applied while working with heat and fire. Due to the following reasons:

Do not touch.: Touching the heat and fire can cause burns and injuries.

Keep flammables away: The flammables can catch hazardous fire while coming in contact of fire or heat.

Avoid touching face and eyes: Avoid fire and heat coming in contact with fire and eyes as it can produce irritation and burns.

Keep clothing away from flame: The cloths may burn while coming in contact of fire.

Do not mix chemicals unless told to do so. : Certain chemicals directly catch enormous fire when coming contact of fire or heat.

Tie back hair.: The loose hair may burn while working with heat or fire.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times