How many electrons would it take to equal the mass of a proton? use two significant figures.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.