12. The distribution of the length of fish in a hatchery is approximately Normal with mean 14 inches and standard deviation 2 inches.

(a) What is the probability that 16 randomly selected fish have a mean length more than 14. 5 inches?

(b) What is the probability that 64 randomly selected fish have a mean length more than 14. 5 inches?

(c) Explain why the probabilities in (a) and (b) are not equal.

When a rectangular region is defined using an appropriate style, which value matches the specified edge of the clipping region to the edge of the parent element?

Draw the hierarchy chart and design the logic for a program that calculates service charges for hazel's housecleaning service. the program contains housekeeping, detail loop, and end-of-job modules. the main program declares any needed global variables and constants and calls the other modules. the housekeeping module displays a prompt for and accepts a customer's last name. while the user does not enter for the name, the detail loop accepts the number of bathrooms and the number of other rooms to be cleaned. the service charge is computed as $40 plus $15 for each bathroom and $10 for each of the other rooms. the detail loop also displays the service charge and then prompts the user for the next customer's name. the end-of-job module, which executes after the user enters the sentinel value for the name, displays a message that indicates the program is complete.

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.