A factory produces two types of widgets, A and B. The equation models the total number of units produced in a day, where is the number of hours spent producing widget A and is the number of hours spent producing widget B. Which of the following is the best interpretation of in this context?
The number of hours spent producing widget A.
The number of units of widget A produced per hour.
The total number of widgets of type B produced.
The total number of units produced in a day.
