In two sentences, what is constructor chaining and why is it useful? Provide a brief example of when you would use this().

Write a concrete toString method for Book. The String representation of a Book is “[title] by [author] has [pageCount] pages remaining” (without the square brackets, replacing the square brackets with the values from the indicated instance variables).

Static methods can directly access instance variables without creating an object.

Write a protected visibility method for Book called updatePages. The method should take one parameter, which is an int, and it returns nothing. This method should subtract the number of pages read (the parameter) from the Book’s current pageCount. If the subtraction results in a negative number or zero, set pageCount to 0.

What is the purpose of encapsulation? (select only one)

An abstract class in Java can have both abstract and concrete methods.

What is the result of calling Math.random()? (select only one)

For the following three dimensional analysis problems, write your answer on a piece of paper and scan and upload your answers.    (5 pts) 1. A student weighs 95 kg. What is his weight in lb?  (1kg = 2.21 lb) (Show details of your calculation, including setup with all conversion factors. units and sig figs.)     (15 pts) 2. How many feet are there in 15.2 km? (1 foot = 12 in;  1 in = 2.54 cm) (Show details of your calculation, including setup with all conversion factors. units and sig figs.)     (20 pts) 3. Toyota Prius has a fuel efficiency of 54 mi/gal (i.e 54 ).  If you need to communicate with your friend in Canada, what is the fuel efficiency in km/L (i.e. )?  (For your conversion factors setup, use the following given information.  0.946 L = 1 quart;   1 gallon = 4 quarts;     1 mi = 5280 ft; 1 ft = 12 in;  1 in = 2.54 cm; Values for prefixes need to be memorized, will not be provided during tests.)) (Show details of your calculation, including setup with all conversion factors. units.)

Which sequence correctly identifies the type of federalism illustrated in each of the three COVID‑19 cases? Maryland Governor Larry Hogan independently securing 500,000 test kits from South Korea after the Trump administration said pandemic response was primarily a state responsibility. U.S. Congress distributing billions through the Coronavirus Relief Fund to states, large cities, and counties. Texas Governor Abbott lifting restrictions earlier than federal health agencies recommended and overriding stricter local rules in Austin and Travis County.

Toward the end of The Best We Could Do, a disaster happens in 14-year-old Thi’s apartment complex that she is in with members of her family. What is the disaster and what does Thi do?