The wait time of a line t hours after a store opens is given by the expression. 40x−12x+23 what does the value 23 represent?
a. the total number of people in line
b. the rate at which people join the line
c. the number of people in line when the store opened
d. the total rate of change in people per hour

In this instance, the correct answer is A - 23 represents the total number of people in the line. We can know this because in an equation like this the other values will not be definite, because they will be factors that vary as time goes on. The amount of people, however, will be a definite rounded number such as 23.

Question: Find the area of a circle with a radius of 4

16π or 50.24

Explanation: The formula to find the area of a circle using radius is (A = Area, R=Radius). You substitute r for 4 then square it to give you 16π. Now you can either give the answer as 16π or 50.24.