Write a program that prompts the user to enter a month (1-12) and year, then displays the number of days in the month. For example, if the user entered month 2 and year 2012, the program would display that February 2012 has 29 days. Be careful with February. If the year entered is a leap year, your output should show that February has 29 days. Use the "Case Study: Determining Leap Year" on p. 105 of Introduction to Java Programming for information on how to calculate the leap year. It does not exactly happen every four years.

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.

The qwerty keyboard is the most common layout of keys on a keyboard

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e.g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?