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?

   Hint (a):

   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.)

   Partial Answer (b):

   $\frac{\text{customers}}{\text{hour}}\cdot \text{hours = }$

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 $16$ customers during that time. Should they hire an extra worker?

   Hint (c):

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