A program runs alone on a CPU. The CPU clock rate is 3e9 cycles per second, i. e., 3 GHz. It takes the CPU 15e9 clock cycles to complete the program. The CPU clock cycle time is 500e-12 second, i. e., 500 picoseconds. How many seconds is the CPU performance for the task?

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.

Write an essay on online collaboration, how to do it, the challenges, resolving the challenges, and consider whether the risks are greater than rewards. ( need )

Use the keyword strategy to remember the meaning of the following word. the meaning for the word has been provided. write your keyword and describe the picture you would create in your mind. obfuscate: to make something so confusing that it is difficult to understand.