Theresa is about to conduct an experiment with a flammable gas. What should Theresa do before she starts the experiment?

Theresa must first use a mask that helps her to breathe, without inhaling the gas, allow an efficient air circulation, use any and all equipment necessary to carry out this experiment safely, keep the gas bottle closed while the gas is not being used , remove any source of heat or ignition, do not allow the presence of people with cigarettes, flashlights or any source of light or heat, do not open the gas bottle near vials with oxidizing gases and wear gloves and safety glasses.

Explanation:

Handling flammable gas is very dangerous and this can harm the experimenter as well as the surrounding environment. For this reason, Theresa must be aware of all safety guidelines imposed for the use of this type of element, maintaining the safety of herself and all the place.

this is an outline for the decisions that frankie is going to make

opportunity cost

willingness to buy

price or quality

of course, there could be many economic strategies that should be considered important while making decision. opportunity cost is the foremost significant factor while considering any economic option. when you buy something, you should know how much you are forgoing for this product. indeed, you could buy something different with this measure if you changed your mind. willingness to buy shows how much surplus you are earning while making a decision. it is important because it shows you buy what you want or you buy because you have only limited amount of money. the price or quality can be considered as a general economic option that we are applying while buying something. when you buy something, price or quality could be one of the options. indeed, they define the characteristics of the product.    

mark brainliest!

first of all, it's important to say that the book we shall not be moved, written by joan dash, is about the first strike of women in the united states in the year 1909. the best historical detail to clarify the reader's undertanding is the phrase "general strike". this strike involved women working at a garment factory who decided to protest   long working hours, low wages and brutal conditions. this strike became known as "the new york shirtwaist strike" or "the uprising of the 20,000". the strike mostly involved jewish women who did not speak english or who had a basic knowledge of the english language. finally, the strike went on from november 1909 until february 1910.