Write a Racket function countdown with the type int*int -> int list that takes two arguments (from and to) and returns a list with all the numbers between from and to.

Asequential circuit contains a register of four flip-flops. initially a binary number n (0000 ≤ n ≤ 1100) is stored in the flip-flops. after a single clock pulse is applied to the circuit, the register should contain n + 0011. in other words, the function of the sequential circuit is to add 3 to the contents of a 4-bit register. design and implement this circuit using j-k flip-flops.

For which utilities, if any, does the landlord pay?

List at least one thing to check for when you're checking the clarity and professionalism of a document.