Which of the following are exact numbers?~The mass of a paperclip~The surface area of a dime~The number of inches in a mile~The number of ounces in a pound~The number of microseconds in a week~The number of pages in this worksheet (1)

Answer:Explanation with the help of discrete variables and continuous variables.Step-by-step explanation:We have to tell that which of the following can be an exact number.This can be done with the approach of discrete and continuous variables.Discrete variables are the variables that are countable and cannot be expressed in decimal form. They are point estimated.Continuous variable are the variable that are estimated with the help of an interval. Their values can be expressed with the help of a decimal expansion. They are not countable.a) Mass of a paper clip, Surface are of dime, Inches in a mile, Ounces in pound, microseconds in a weekSince all mass, area, weight(ounces), time, length(inches) are continuous variable, they can be estimated with the help of an interval. Thus, they can have exact number but not always.b) Number of pages in a worksheetSince this is a discrete quantity and it is countable. Thus, it will always have a point estimation and are exact numbers always.