### Home > CCA2 > Chapter 10 > Lesson 10.3.1 > Problem 10-152

Parking meters in a beach resort town cost 25¢ for 15 minutes. A normal distribution with a mean of $10 and a standard deviation of $2 can be used to model the amount of money one parking meter makes on a busy summer day.

*10-152 HW eTool*(Desmos). Homework Help ✎Make a graph of the distribution of the money made by one meter on your calculator, and sketch it. An appropriate value for the maximum of the relative frequency axis is Ymax = 0.2.

From your graph, visually estimate where the middle 90% of meter earnings fall. Shade this portion of your sketch.

Use your calculator to check your estimate. How close to 90% did you come?

normalcdf(lower estimate, upper estimate, 10, 2) = 0.90

Use the eTool below to help solve parts (a - c).

Click the link at right for the full eTool version: *CCA2 10-152 HW eTool*