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Home > PC3 > Chapter 4 > Lesson 4.3.2 > Problem 4-121


First quadrant graph, x axis labeled, time, scaled from 9 a.m. to 3 p.m., y axis labeled, customers per hour, scaled from 0 to 9, Bell shaped curve, vertex at (12 noon, comma 9), area between, x axis, curve , x = 11 a.m. & x = 1 p.m., is shaded.Spannoni’s Deli is keeping track of the rate of customers who are served on a typical day. 

  1. Why does this graph have this kind of shape?

    When do most customers come in?

  2. What does the area shown in the shaded region represent? (The interval of the shaded region starts at 11 a.m. and ends at 1 p.m.)

  3. Ms. Spannoni thinks that they should hire an extra worker for the lunch rush (11 a.m. to 1 p.m.) if they have over customers during that time. Should they hire an extra worker?

    What is the approximate area under the curve for the specified time interval?